Lenovo IdeaPad K1 review

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Let's do a roll call, shall we? Who doesn't have a Honeycomb tablet to shill in the states? Acer, ASUS, Motorola, Samsung, Sony, and Toshiba all have something to their names, with Dell possibly bringing its China-only Dell Streak 10 Pro here too. Until now, Lenovo was one glaring exception. The company already had a head start selling the LePad tablet in China, but it was only last month that it announced not one, but two Honeycomb slates for the US market: the IdeaPad K1 for mainstream consumers, and the ThinkPad Tablet for business users (and a fair share of geeks, too). Now, we could easily roll our eyes at how saturated the market for Android tablets is becoming, but Lenovo isn't just any old OEM. The brand has won such an avid following that we bet the company could have essentially slapped its name on a plain-Jane black slab and waited for loyal fans to line up.

In fact, though, you're in for a bit more than name recognition. The K1 goes after mainstream consumers with a winsome design, sure, but also a software package designed to make Honeycomb easier to use, and to help ensure that flummoxed, low-tech users don't have to spend too much time downloading apps out of the box. What's more, it ships with Android 3.1 and has a two-cell battery like IBM 08K8199 Battery, IBM 08K8198 Battery, IBM 08K8197 Battery, IBM 92P1075 Battery, IBM ThinkPad R40 Battery, IBM ThinkPad R32 Battery, IBM 02K7054 Battery, IBM ThinkPad A20 Battery, IBM ThinkPad A20M Battery, IBM ThinkPad A21M Battery that promises up to ten hours of battery life. Oh, and the 32GB model rings in $499, undercutting the 32GB iPad 2 and Samsung Galaxy Tab 10.1 by $100. But is that enough for it to stand out? Let's see.

Like so many other Honeycomb tablets, the K1 packs a 1GHz NVIDIA Tegra 2 SoC. Mainstream consumers might look at us cockeyed if we told them the performance could be zippier -- for those folks, the performance should be plenty fast. But more discerning techies will likely notice some lags when minimizing and opening apps. The screen was also often slow to switch orientations as we flipped from landscape mode to portrait and back, and more than once the display was unresponsive, leaving us tapping multiple times before the tablet did what we wanted it to. In general, we tend to say that all Tegra 2 tablets have some obvious performance limitations, but the K1 felt pokier than others we've tested. Indeed, its score of 1,448 in the Quadrant benchmark falls short of the 1,546 and 1,584 that the Thrive and 10.1 notched. And while we try not to put too much stock in benchmarks, we think these numbers are telling, given our anecdotal experience with the device.



Also, not to beat a dead horse, but at some point during our testing, we took a break to play with the 10.1, and immediately breathed a sigh of relief. It's hard to tell how much of that was the 10.1's solid-yet-lighter build, the bright display, or the quick performance, but boy, did we miss it. The 10.1 is markedly faster, and the difference becomes painfully obvious when you play with the two side by side. The 10.1 is quicker to respond to taps and swipes, its screen rotates faster, and it opens and minimizes apps more briskly.

Benchmark	Score
Quadrant	1,448
Linpack	32.77 MFLOPS (single thread) / 61.33 MFLOPS (multi-thread)
Nenamark 1	30.1 fps
Nenamark 2	19.6 fps
Vellamo	945

The K1 has a 2-cell, 7400mAh battery that promises up to ten hours of battery life -- the same claim made by the iPad 2. In our standard Toshiba PA3641U-1BAS Battery rundown test (movie looping, WiFi on), it lasted eight hours and twenty minutes, matching the Motorola Xoom and falling about ten minutes short of the TouchPad. But it doesn't approach the Galaxy Tab 10.1's ten hours nor the iPad 2's ten and a half, which seems like a problem given that the K1 is markedly chunkier. If a tablet's going to be bigger, we want it to make up for it with longer battery life and / or more robust performance. The K1 doesn't quite do that on the longevity front, though it did have a much better showing than the Thrive, which lasted just six and a half hours in the same test.

	Battery Life
Lenovo IdeaPad K1	8:20
Apple iPad 2	10:26
Samsung Galaxy Tab 10.1	9:55
Apple iPad	9:33
HP TouchPad	8:33
Motorola Xoom	8:20
T-Mobile G-Slate	8:18
Archos 101	7:20
RIM BlackBerry PlayBook	7:01
Toshiba Thrive	6:25
Samsung Galaxy Tab	6:09
ASUS EeePad Transformer	Ran a different test

The IdeaPad K1 is cute, (relatively) affordable, and easy to use, and we know it'll be a sensible choice for some shoppers. We're just not sure that's you, our dear, tech-savvy readers. See, the K1 has two big strengths: one, it's aggressively priced, starting at $449 for 16GB (granted, that version's not on sale, so if you buy today, it's going to be the $499 32GB model). The other major thing the K1 has going for it is simplicity. Lenovo's tweaked Android 3.1 so that settings are easier to find and apps are a cinch to kill. It also comes with an array of popular apps (or bloatware, if you're cynical). Factor in the attractive design, and we can recommend this, particularly for people with budget constraints, or those looking to give a techie gift to a not-so-techie person. Those things aside, the K1 is heavier than most tablets, and doesn't justify its heft with additional ports, extraordinary battery life or even zippy performance. If you didn't want ports anyway, and know your way around Honeycomb without Lenovo's help (thank you very much), why not just get something thinner, faster, and longer-lasting? Or, you know, at least stick around and see how Lenovo's geekier ThinkPad Tablet fares.

Hewlett Packard Jornada 820

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It's very rare that you get a piece of kit in for review that makes you re-evaluate what you want from a computer, but the Jornada 820 is one of those beasts.

The first thing to mention here is that the 820 is pushing the limits of what you can actually call a PDA. It's more of a sub-notebook, but then again it runs Windows CE, which is part of the attraction of this device. It brings together the best of both worlds, but more on that later.

The 820 is the top-of-the-range device among the Hewlett Packard (HP) CE PDAs. With dimensions of 246 x 178 x 33mm and weighing in at 1.1kg, it's a lot larger than any of the Windows CE handheld devices on test here, but it is still relatively diminutive when you compare it to a full notebook.

One of the benefits of its larger size is that there is very little compromise when it comes to inputting data. You are presented with an excellent keyboard, that is responsive and has plenty of travel. The good news for those who expect to do a lot of typing is that it is comfortable to use for extended periods. Just below the keyboard you'll find a touch-pad. This is slightly smaller than those you'll find on a notebook, but because the 820's screen isn't as big as that of a laptop, you don't need as much surface area to navigate the screen.

The only problem we found with the keyboard is that it doesn't tilt, so when you're using the device on a flat surface your hands are at an uncomfortable angle. Nevertheless, most people are likely to use the 820 on the move, where you are more likely to be resting the unit on your knees, giving you a better typing angle anyway.

The other advantage of the larger form is that HP can afford to kit out the device with a pretty impressive colour screen. While the CSTN technology used is a little outdated, the screen is bright, displays vibrant colour and offers a very respectable resolution of 640 x 480. The viewing angle, while not amazing, is easily good enough for everyday use. If you're working at a desktop, you can even plug the device into a standard desktop monitor via the VGA port at the rear of the unit.

If you venture round the back of the unit, you'll also find a USB connector nestling next to the VGA port. We tried plugging a Microsoft USB Intellimouse into this and it worked first time without even pausing to load a driver. This was a true demonstration of plug-and-play, but then again there aren't many other USB devices that come with Windows CE drivers. HP says that Y-E Data's Flashbuster-U floppy drive will also work, but we haven't tested this. It's a great shame that you can't make use of the USB connection to transfer files between the 820 and a desktop PC; instead you are stuck with the slower serial option.

To the right of the USB port you'll find the telephone connector for the modem, which is a 56K model. While the modem's performance is not wonderful, it's still a welcome addition. If you feel you can do without the modem, you could always opt for the 820e model.

On the rear you'll also find a 4Mbits/sec IrDA port, which is a nice location for it, as it means you can leave another device communicating with the 820 while you type away at the front of the unit. Other slots and ports can be found on either side of the device. The right-hand side is home to the Compact Flash card slot, the AC port and the serial port, while the opposite side sports the PC Card slot and the battery backup compartment.

The main battery slot is underneath the unit much like a laptop battery such as Hp Pavilion dv9000 battery(Hp dv9000 battery), Hp EV087AA battery, Hp EX942AA battery, Hp Pavilion ZT3000 battery, Hp 337607-001 battery, Hp 337607-003 battery, Hp PB992A battery, Hp PB994A battery, Hp PB991A battery. The only difference is that with the 820 you get a whopping 10 hours of battery life, due to the lack of moving parts and general efficiency of the device.

Synchronising the device to a PC is simply a matter of loading up Windows CE Service 2.2 on the PC and making sure both devices are set to communicate at the same speed. We had no problem transferring contacts and appointments between the device and Outlook 2000.

As far as software is concerned, you get the full Pocket office suite. HP has also included some extra utilities, such as settings applets for the VGA port and the touch-pad. There are also some extras on the CDRom bundled with the device, such as software to allow you to print directly from the 820 and Outside In email attachment viewing software from Inso.

All in all, the Jornada 820 is a joy to use. The keyboard is touch-typing friendly, the screen looks great and the supplied applications take care of all your daily needs. If you were thinking of buying a laptop, but wanted something a bit smaller yet still with a long battery life, the 820 is the machine to go for.

Apple MacBook Pro 15 reviewed

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The allure of the MacBook Pro is simple. With power enough to please performance die-hards, and the poise to please fashionistas, Apple's flagship laptop was always destined to impress. But, with previous models still chugging along on Core 2 processors, many will have been holding off for this inevitable Core i7 upgrade.

Performance

The price is still enough to put a lump in anyone's throat, but the outlay rewards with the usual Apple delights. The major news is that the slick aluminium chassis is now joined by some up-to-date internals - but, although it's definitely fast, it isn't quite as fast as you might expect. Intel's Core i7-620M is teamed with 4GB of DDR3 memory, propelling it to a fine 1.75 in our benchmarks, but it's still a whisker behind two other recent i7 converts - Sony's VAIO Z11 on 1.80 and Lenovo's ThinkPad T510 (PC Authority, July 2010) on 1.91. The 5400rpm hard disk shares some of the blame; at this price, a 7200rpm disk would seem more appropriate.

Graphics

More interestingly, in a first for Apple, graphical duties are handled by dual GPUs comprising the on-CPU Intel HD graphics and Nvidia's discrete GeForce GT 330M chipset. The burlier chipset of the pair, the GeForce GT 330M, fired through Crysis at 1280 x 1024 and Medium detail with a borderline-playable average of 26fps. Intel's HD graphics, meanwhile, proved man enough for HD video playback.

The duo works wonders in Apple's OS X Snow Leopard, with Intel's HD graphics taking the reins most of the time and the Nvidia chipset automatically stepping in when more graphical muscle is required. Unfortunately, it's a great trick that you'll only appreciate in OS X. It's painfully absent when running Windows.

Battery Life

Boot Camp works as simply as ever for Windows installation, but the Nvidia chipset takes a serious toll on battery such as apple PowerBook G3 Battery, Apple PowerBook G4 Battery, Apple PowerBook G4 15inch Battery, Apple A1012 Battery, Apple M8511 Battery, Apple M8244 Battery, Apple A1079 Battery, Apple A1078 Battery, Apple A1148 Battery, Apple M6091 Battery life. The Intel HD chip is efficient, and allowed the MacBook Pro 15 to idle for 8hrs 15mins in OS X; by contrast, with the hungrier Nvidia chip permanently engaged, it managed only 3hrs 35mins in Windows. Push the MacBook Pro 15 hard and you'll be dashing to the mains after just 1hr 25mins.

Features

The frugal sprinkling of two USB ports, one FireWire 800 connector, Gigabit Ethernet and an SD card reader proves as limiting as ever, and although the miniature DisplayPort socket accepts a flexible array of adapters - including DisplayPort, HDMI, DVI and D-SUB - the need to shell out for each one is galling.

Screen

Our hope that this, the most expensive MacBook Pro 15, might stretch to a high-definition display was dashed, too. Image quality is superb, with vibrant colours, good contrast and impressive brightness, but the native 1440 x 900 resolution is disappointing. We wouldn't hesitate in upgrading to the HD-capable 1680 x 1050-pixel display for AU$140.

Design

Spending this much, we'd expect unparalleled levels of comfort, but we were a little disappointed. Admittedly, the glass multitouch trackpad is responsive, but the backlit keyboard isn't on the same level. The crisp action makes the short-travel keys palatable, but the chiselled front edge of the laptop dug into our wrists.

If that wasn't enough, the combination of Intel's Core i7 and the MacBook Pro's aluminium construction causes the chassis to reach worrying temperatures. Light usage heated the wristrest enough to leave our palms sweaty, and heavy multitasking had the underside at scorching temperatures.

Conclusion

Familiarity breeds contempt, as the saying goes, and Apple's latest proves a perfect illustration. From afar it's the usual lovely thing, with power and aluminium-framed panache in equal measures. But the specification is stingy, the keyboard mediocre, the lack of graphics switching in Windows is a killer blow, and the cooling system borders on the unworkable. We're long past the days when Apple did style like no other, and have seen too many far better laptops in recent months - such as the VAIO Z11 - to recommend this one.

Acer announces four new tablet devices for home and business

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Acer today announced fresh details on its four tablet products for 2011: the Iconia Tab A100, Iconia Tab A500, Iconia Tab W500 and Iconia dual screen touchbook

Four new products will soon be jostling for space in the overcrowded tablet market courtesy of Acer: the Iconia Tab A100, Iconia Tab A500 and Iconia Tab W500 and Iconia dual screen touchbook.

The Acer Iconia Tab A100 is an ultra-portable 7in Android tablet in the mould of Samsung’s first Galaxy Tab. Product highlights include a (1024x600) 16:10 aspect ratio full touch screen, a Nvidia 1GHz Dual Core processor, a rear-facing camera, Adobe Flash Player 10.2 and a solid array of connectivity options; including HDMI.

The Acer Iconia Tab A500 is a 10in tablet boasting a Dual Core Nvidia Tegra 2Wi-Fi CPU for speedier load times and Web browsing. Featuring a 10in capacitive touch screen, HD video playback, an in-built HDMI port, and 3D video support, the Acer Iconia Tab A500 is primarily designed for mobile entertainment.

The Acer Iconia Tab A500 runs on the latest Android operating system; 3.0 Honeycomb. We’ve played around with this OS on the Samsung Galaxy Tab 10.1v and can report that it is very user-friendly.

The Acer Iconia Tab A500 will be available from mid-April from $579.

The Acer Iconia Tab W500 is an intriguing tablet device that consists of a 10.1in display and a detachable keyboard. The screen can be removed from its docking keyboard and carried around like a regular tablet.

According to Acer, the Iconia Tab W500 boasts a battery life of up to 6 hours in-between charges like Acer TravelMate 240 Battery, Acer BTP-52EW Battery, Acer BTP-63D1 Battery, Acer BTP-42C1 Battery, acer BTP-44A3 Battery, Acer BTP-550P Battery, Acer BTP-73E1 Battery, Acer BATCL50L Battery, Acer TravelMate 290 Battery, Acer TravelMate 4000 Battery. Other features include two 1.3MP cameras, Wi-Fi and 3G connectivity and Windows 7 operating system preinstalled.

The Acer Iconia Tab W500 will be available from May for an Australian RRP of $899.

Perhaps the most intriguing product at the launch was Acer's Iconia dual-screen touchbook - a desktop replacement-style laptop that comes with two all-point multi-touch displays in lieu of a traditional keyboard.

Users can use each screen to multi-task in any way they see fit; browsing a website on the top screen while viewing folders and documents on the bottom screen.

The Iconia touch-book is based on the Intel Core i5 family of processors and runs on the Windows 7 platform. You can read our first impressions of the device here.

The Iconia dual screen touchbook will be available in April, for a recommended retail price of $2499.

Power Adapter Technology

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Power supplies can be used to convert one form of energy into another. Power supplies may take the form of adapters, a kind of technology that enables current voltage and direction to be modified.

Definition

Power adapter technology rectifies one type of current such as AC (alternating current) voltage input to obtain DC, or direct current voltage output. Rectification is the process of converting AC current, which can reverse direction, into a current that flows in one direction, or direct current (DC). Inverting a current via a power adapter changes DC current to AC current.

Switching-Mode Power Adapter Technology

Alternating current, or AC, contains both positive and negative polarity, which enables it to change current direction.

Switching-mode power adapter technology uses rectification to force both polarities move in one direction to output DC voltage via diodes, or components designed to enable electrical currents to flow in one direction and block current flowing in the opposite direction.

Linear Power Adapter Technology

Linear power adapter technology uses large mains-frequency transformers to convert AC voltage to DC voltage. Transformers send out electrical energy from one current to another via conductor coils. These conductor coils are composed of material that enables the free flow of electrical current.

Power adapters (or power supplies) like Apple iBook G3 14-inch Adapter, Apple M8576 Adapter, Apple MacBook 13-inch Adapter, Apple MacBook Pro 15-inch Adapter, Apple PowerBook 1400 Adapter, Apple M8243 Adapter, Apple M8942 Adapter, Apple A1021 Adapter, Apple A1184 Adapter, Apple A1036 Adapter, Apple iBook G4 14-inch Adapter are a ubiquitous part of our electronics-laden lifestyle.

A power adapter takes the output of one power source, like a 120-volt AC wall socket, and converts it to a different output, for example a 19.5-volt power supply for a laptop computer. Usually these devices work dependably and without worry. But if you find the electronics devices that you have connected to a power adapter are not working properly or that their batteries are not charging, there's always the possibility that the power adapter is not doing its job. With the right tool, however, you can check the output of your power adapter and see if that's the source of the problem.

Examine your power adapter. Every power adapter will have the input voltage and amperage requirements printed on it, as well as the output voltage and amperage rating. We'll be testing the output of the power adapter, so write down the specs. An example would be this, taken from a laptop power adapter: Output - 19.5V....3.34 amps. We'll measure the output of the power adapter with a multimeter -- a very handy tool for anyone working with electronics. A multimeter can measure voltage, current, power output and resistance of electrical circuits by touching the electrical circuits or device with a set of probes. See Additional Resources for a good tutorial on multimeters.

Set your multimeter to the proper range for measuring the output of your power adapter. Take into account the voltage and the amperage you'll be measuring. Consult the manual for specifics on how to set your particular model of multimeter.

Check the data plate of your power adapter to find out which portion of the plug is positive and which is negative. For example, on some power adapter plugs, the outer shell of the plug is positive, while on others it's negative.

Touch the probes of your multimeter to the corresponding portions of the power adapter's plug and note the readout. Compare that with the rated output of the power adapter. If it varies significantly, replace the power adapter.

Dell Inspiron E1405

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Dell has just informed us that the Intel Core 2 Duo T5500(1.6Ghz) processor is in short supply. As such, Dell plans to begin offering the E1405 with a higher Core 2 Duo processor beginning in the last quarter of this year. We anticipate the E1405's performance will improve as a result of this processor upgrade, but battery life might also be impacted.



When I reviewed the Dell Inspiron E1505 last May, I didn't hesitate to give it the Editors' Choice award for offering incredible value at a budget price. The only thing that could've made it better was a lighter chassis and better battery life. Now, there is a "Mini-Me" version of the E1505, the Dell Inspiron E1405 ($1,106 direct; E-Value Code: 9-D81012M). If its size and 8 hours of battery life do not capture your attention, perhaps the new Intel Core 2 Duo processor will. The E1405 will be one of several Inspirons to get the new processor upgrade, and it's priced with frugality in mind. But the performance gains I had expected from the processor upgrade really didn't come to fruition.

If it weren't for the 85Whr (9-cell) battery sticking out from the back, the E1405 would actually be over a pound lighter than the E1505, instead of just 0.8 pounds lighter. Despite the heavier battery such as dell Vostro 1510 battery, dell T112C battery, dell Vostro 1310 battery, dell Vostro 1520 battery, dell Vostro 2510 battery, dell Vostro 1000 battery, dell Vostro 1000 battery, dell T116C battery, dell Y022C battery, dell Latitude E6400 battery, the 5.8 pound system is still easy to tote around. I think the 14-inch widescreen is the perfect size for work and play, and it's one of few 14-inch displays to sport a 1440-by-900 resolution. Most budget systems with a 14-inch screens (and even budget systems with 15.4-inch screens, like the E1505) usually max out at 1280-by-800(WXGA) resolution. As a matter of fact, except for the weight and the screen, the two systems offer the same features, just at different dimensions.

Like its predecessor, the E1405 also has a 1.6-GHz processor. The main difference, of course, is that while the E1505's chip was an Intel Core Duo T2300, the E1405 has the new Core 2 Duo T5500. (Keep in mind that the E1505 will also get the processor upgrade in the future). On the SYSmark 2004 SE Internet Content Creation tests, I saw an 11% performance increase over that of the E1505. Office Productivity tests, surprisingly, were dead even. This tells you that media related tasks will benefit more than office applications will from an upgrade to a system with the T5500 chip. Photoshop tests were nearly neck and neck, so you won't see much of a performance gain there. Even video encoding tests improvements were minimal. In contrast, systems using the higher-clocked Intel Core 2 Duo processors (such as the Dell XPS M1710 with its Intel Core 2 Duo T7600 mobile processor, and Gateway M465-E with its Intel Core 2 Duo T7400 mobile CPU) saw 20% improvements in performance on the tests over the 1.6-GHz Core Duo mobile processor-equipped E1505.

The E1405 uses integrated graphics, which might have some people yearning for the discrete ATI graphics on the E1505. Discrete graphics is simply better for gaming, and spec-wise, it'll be ready for Windows Vista, Microsoft's next-generation operating system. The advantages of going with integrated graphics, you ask? Well, insanely long battery life for one. The 8 hours and 9 minutes that the E1405 achieved in MobileMark 2005 tests is the most impressive battery score to date on all laptops. The 85Whr (8 Cell) battery was a big factor, and low powered components contributed to the system's score. You also end up with a cooler system because of this. Using an infrared thermometer, temperatures barely climbed to 40 degrees Fahrenheit, as opposed to triple digit temperature readings on systems running higher clocked Core 2 Duo processors. Ultimately, battery life makes the E1405 a better traveling companion than the E1505.

More In the end, there are certainly performance gains for the E1405, with its Intel Core 2 Duo mobile processor, over that of the E1505, with its Intel Core Duo mobile CPU, but not as much as I would have hoped. You'll see better gains in systems using higher-clocked mobile Core 2 Duo CPUs. Performance is still top-notch, and if battery life and portability are at the top of your list of priorities, the Dell Inspiron E1405 is a solid notebook for frugal shoppers.

Have You Got A Lifeless Battery?

Have you ever been late for work, jump in the car or truck, flip the key and get the upsetting noise of nothing transpiring? It has occurred to just about everyone at one time in their lives. So can you be sure if its your battery or anything else which is causing your vehicle not to start? Listed here are a few tips for you to examine the battery.

A lifeless battery or a discharged battery is often a likely issue causing the car to not start. This may happen for a variety of reasons including: leaving the lights on once the car or truck is actually off, leaving the dome light on or perhaps a car door ajar. All of these will deplete the charge from the battery such as Hp Pavilion dv9000 battery(Hp dv9000 battery), Hp EV087AA battery, Hp EX942AA battery, Hp Pavilion ZT3000 battery, Hp 337607-001 battery, Hp 337607-003 battery, Hp 398876-001 battery, Hp PB992A battery, Hp PB994A battery and Hp PB991A battery. If the battery still has a little life left inside it, you should notice a clicking noise whenever you flip the key in the ignition. This particular clicking is signaling that there's insufficient electric power available to move the starter motor.

A super easy way to find out if the battery is low is to flip the ignition on and with the motor off, start the windshield wipers. If they move slowly, slower than usual or even not at all it is most likely on account of a lifeless battery. It's also possible to take a look at the dashboard and dome lights; in the event the power is reduced they will be dim or maybe very low too.

In case you have a rather new battery, it may be charged up again. You can do this by jump starting it through an additional car or maybe by using a battery charger. Utilizing a charger will usually require a power supply like in the home and could take anywhere from twenty minutes to many hrs depending on the type of charger. The simplest way to give the battery a charge would be to use jumper cables through another car.

Greeley Auto Repair

Once the car is started, allow it to run for at least 10 minutes. This will recharge the battery power by using the alternator. You can also drive the car after it is started, however , you should check out the lights and wipers to make sure the battery is being recharged. If it is not, you should drive to an Auto Repair Shop to get a new battery so you don’t get stuck again.

Importance of Battery

one should know that battery is a joined form of many electrochemical cells which is used for the conversion of stored chemical energy into electrical energy. Battery was first time discovered by alessandro volta after which it has become constant source of power in household and many industrial applications. But as per reports available on battery it is now multi-billion dollar industry across the globe.

People generally used battery once and later throws it. But in many cases it is recharged for longer time in many power applications. In small devices such as wristwatches and portable electronics miniatures battery is used among users of it. But one should know that big battery is used as standby power source in telephone exchange and computer centers for storing the data and other related applications.

The name "battery" was produced by benjamin franklin which later defined as combination of two or more cells. But generally battery is taken as a single electrical cell among users in the market. Now in the market varied colors, designs, and types of battery are avialable in the market. Earlier electrochemical battery were termed as baghdad battery which is used as antiquity. But recent battery termed as voltaic pile which was delivered by italian physicist alessandro volta in the year 1800 in the market.

Generally battery such as Hp Pavilion dv9000 battery(Hp dv9000 battery), Hp EV087AA battery, Hp EX942AA battery, Hp Pavilion ZT3000 battery, Hp 337607-001 battery, Hp 337607-003 battery, Hp 398876-001 battery, Hp PB992A battery, Hp PB994A battery and Hp PB991A battery is found in two forms such as primary and secondary forms in the market. The primary battery converts chemical energy into electrical energy automatically whereas secondary battery needs recharging processing. One should know that the oldest form of battery is lead acid battery. One should gather information about battery to know its pros and cons to avoid touching of bad quality battery from the market instead of feeling cheated. One should discuss iwth retailer before buying any kind of battery as per once usage and requirement in daily life.

But recent battery termed as voltaic pile which was delivered by italian physicist alessandro volta in the year 1800 in the market.

Generally battery is found in two forms such as primary and secondary forms in the market. The primary battery converts chemical energy into electrical energy automatically whereas secondary battery needs recharging processing. One should know that the oldest form of battery is lead acid battery. One should gather information about battery to know its pros and cons to avoid touching of bad quality battery from the market instead of feeling cheated. One should discuss iwth retailer before buying any kind of battery as per once usage and requirement in daily life.

Laptops For Checkout

Laptops for checkout. But we just spent thousands on all these desktop computers for the public, and now they want laptops! What can you do on a laptop that you can’t do on a regular PC. Well, several things. Patrons can’t install their own software on your desktop computers, but with the right setup, you can give patrons free reign on your checkout laptops. Also, laptops are great for group work. Five or six students can reserve one of your meeting rooms and take a laptop in there to work together on a project. Finally, laptops are mobile, allowing patrons to move around among your different departments and collections. If you’ve run out of space and can’t provide any more stationary computers for the public to use, laptops might be the way to go.

This section of the Cookbook lays out some tips and recommendations for those libraries that are planning to implement a laptop checkout program. The primary focus here is in checkout laptop safeguards, as well as laptop and filtering considerations.

TOPICS TO BE COVERED:

. Laptop Security

. Laptop Maintenance

. Buying Your Laptops

. Do You Need to Filter Your Checkout Laptops.

. Check Out This Real, Working Laptop Checkout Program

64 THE JOY OF COMPUTING – RECIPES FOR A 5-STAR LIBRARY

Laptop Security.

So … what about laptop security. What’s to keep someone from checking out a laptop and walking away, never to be heard from again. What if a patron drops it.

Here are some actions you can take to secure your laptop:

. Picture ID — Hold their driver’s license or another photo ID until they return thelaptop.

. A checkout form — Ask your patrons to sign a form indicating that they won’t take the laptop out of the library and what their responsibility is should they damage it

somehow.

. Accidental damage protection — For an extra charge, most hardware companies will repair or replace your laptop should it get damaged.

. Serial numbers — Engrave the serial number into the laptop and then keep track of those numbers.

. RFID or security tags — Tag the laptops in several places

. TattleTape — Put some “tattle tape” or “tamper strips” over the security tag, over the hard drive bay, over the battery such as dell Inspiron 500m battery, dell Inspiron 510m battery, dell Inspiron 600m battery, dell Latitude D500 battery, dell Latitude D505 battery, dell Latitude D510 battery, dell Latitude D520 battery, dell Latitude D600 battery, dell Latitude D610 battery, dell 312-0068 battery, dell 6Y270 battery, dell 1X793 battery and dell C1295 battery, over the memory bay and elsewhere, so you don’t get a laptop back and find out later that it’s missing a key component.

. “LoJack for laptops” —LoJack is a product that tracks your computer. When a laptop with this product is lost or stolen, it begins to “dial home” every time it’s connected to the Internet. Computrace, who makes the product, will alert the police and provide them with the information they need to recover the laptop. To see if this product will work with your systems, go to:

http://www.itsbattery.com.

. Your staff — Make sure that staff at the front desk know what to check for when the patron returns the laptop. They should look for all the major pieces before returning the patron’s photo ID.

Security Tags as a Safeguard Notes from

a Chef “All the systems are security engraved in numerous places, and all serial numbers are kept in

our database. To stop them from walking out of the door, I have placed visible and not so visible security tags on them that will trigger the alarm system when they are taken out of the

building. We do not allow patrons to take them outside. The laptop bags also have two or three security tags in them, so if someone does try to steal one, they would have to find at least six or

seven tags to get over all the security!”

Terry Caudle Madisonville Public Library, TN THE JOY OF COMPUTING – RECIPES FOR A 5-STAR LIBRARY 65 No Insecurities About Security

Notes from a Chef

“We are very lucky here; this is the kind of place where people don’t lock their houses or their cars, and so security is not an issue here. We do check them out to people. If they have a

library card, we check them out to them; if they don’t, we still let them use them, but they give us their driver’s license or something — we hold onto it. And we have never had one walk out the door, and we would all be flabbergasted if it happened here.”

Laura Tretter

San Juan Island Library, WA

The Lowdown on LoJack Notes from a Chef“Among other things, I was told by several excellent sources to get LoJack for Computers, sold by many computer vendors (Computrace is its real name). I guarantee it will seem affordable the first time they recover a ,000 laptop! The ‘we can’t afford it’ line doesn’t wash with me —

when I worked to develop a laptop checkout program, I struck a couple of the laptops from the plan in order to afford things like Computrace, a locking case, extra cords, etc.”

Portable USB Laptop Speakers

But there are plenty of well-engineered portable speaker systems on the market today. They draw power from the computer through USB cables, but they are so energy-efficient they can be used on battery power for extended periods. Theyre tiny two inches in diameter or less so they fit into a notebook case. Most importantly, the best portable speakers are rugged, with metal cases and protective grilles over the speaker membranes.

Amenities to look for in portable speakers include volume and playlist controls, which allow you to select songs and adjust the sound without typing or clicking with a mouse. A single cable running from USB port and through both speakers is simpler and less liable to tangle than a pair. Mini-jacks for MP3 players, an iPhone, and other sound sources are built into some speaker systems.

Remote-control speakers are available for adjusting sound and selecting tracks during presentations.

Australian leading laptop batteries such as dell Inspiron 500m battery, dell Inspiron 510m battery, dell Inspiron 600m battery, dell Latitude D500 battery, dell Latitude D505 battery, dell Latitude D510 battery, dell Latitude D520 battery, dell Latitude D600 battery, dell Latitude D610 battery, dell 312-0068 battery, dell 6Y270 battery, dell 1X793 battery and dell C1295 battery, camcorder batteries, camera batteries, laptop ac adapters supplier. Specializes in laptop computer battery, notebook batteries, HP laptop batteries, Dell laptop batteries, Toshiba laptop batteries, Acer laptop batteries.

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Here are a few USB-powered portable speaker systems that I think are good choices:

* Logitech V20 Notebook Speakers are lightweight, USB-powered, and offer spectacular sound reproduction, especially in the bass and high ranges. One nice feature: you can change tracks or adjust the volume right from your speakers. Street price: $69.

* Creative Labs N400 portable notebook speakers come with X-Fi technology that promises to enhance your MP3s, and turn music and movies into immersive surround sound. The N400 has a single USB cable for both power and audio, built-in control buttons, and a compact travel case. Street price: $69.

* The Altec Lansing iML237 USB ORBIT is billed as ultraportable,. But the ORBIT delivers surprisingly big sound from a small form factor. The round design provides a 360-degree sound field, making it good for parties. Street price: $49.

* HP USB Mini Speakers are small, compact and offer great sound for the price. On the downside, they lack onboard controls, and require you to fiddle with three color-coded cables for setup. A nice set of travel speakers, and I found them on Amazon for only $24.

In addition to those listed above, other portable speaker manufacturers include Pioneer, Sony, Tritton, Yamaha, the Edirol division of Roland, Alesis, and many others. The best place to buy portable speakers depends on your budget and tastes. If youre going to buy anything under $80, shop around online to find the best deal. If youre a true audiophile, youll want something in the higher end. In that case, specialty audio stores will have the widest variety of high-end portable speakers for you to sample before buying.

Mistakes of Notebook Battery Maintenance

Notebook computer from the birth of the day, the argument was about the battery never stopped , because of the use of a laptop computer lasting a very important technical indicator , and battery capacity of the notebook determine this important indicator . In the end how to use to maximize battery efficiency , longer battery life then ? Below, we list some people you will always vulnerable to the error : ( without the instructions are for now the most commonly used lithium-ion battery)

1 , first use the dell laptop battery such as dell Inspiron E1705 battery, dell Inspiron 6000 battery(dell 6000 battery), dell Inspiron 9300 battery, dell Inspiron 9400 battery, dell 310-6321 battery, dell 310-6322 battery, dell D5318 battery, dell G5260 battery, dell G5266 battery and dell Latitude CPi battery,, the first three need to charge 12 hours ?

This is totally unnecessary . Because notebook computers have now improved power management circuitry and charging management system , when the battery reached saturation , control circuit will automatically switch to off state, so long as Chong Man on the line, Bing Bushi that you can charge the more longer on the longer Of .

Second , in order to prevent the memory effect , we should run out of power before charging it?

Each charge before the battery discharge is not necessary , but also harmful. As proved : the depth of discharge of the battery will shorten the laptop battery life meaningless , it is recommended when the batteries when used in about 10% can be charged up . Of course, there are still 30% when battery power for more than best to be charged , because the memory effect does exist.

3 , insert the AC when the battery should be seized, and to prevent the repeated charge and discharge it?

I give advice to you is : do not ! Of course, you can take the natural discharge of lithium-ion batteries to refute me, and that the natural discharge of the battery after the power supply access will occur if repeated charge and discharge , and reduce the battery life. I give you " instead of " This is the answer for several reasons :

1 . Now all notebook power control circuit design of this feature : When the battery is 90 % ( such as HP 's most models ), or 95% will be charged , but to achieve this through natural discharge capacity of a time for 2 weeks Month, when the battery is idle for a month or so to fully charge and discharge to maintain the battery 's capacity, this time you should be concerned about is the battery little bit of exercise instead of being idle again after the charge .

2 . Even if the battery "unfortunate "was once again charged , bringing the loss will not be long without the battery than the power drop caused by a large number .

3 . your data than you or your notebook batteries are much more rare , a sudden power failure has not only hurt your notebook , can not restore the data is no time for regret.

Fourth, long-term storage battery is fully charged you need ?

Read the following to clear the table : ( percentage of saturation at the time the relative percentage of the initial value )

Storage Temperature 40% Charge 100% state of charge state

0 degree 98% ( a year later ) 94 % ( one year later)

25 degrees 96% (one year later ) 80 % ( one year later)

40 degrees 85% ( a year later ) 65 % ( one year later)

60 degrees 75% ( a year later ) 60 % ( 3 months later)

Clearly, if long-term storage batteries, dry and cold as much as possible on the environment and let the battery charge remaining 40 % of the best. Of course, the best take the battery out every month with one , can guarantee the good state of preservation battery, not that bad for the loss of damage to the battery power completely .

Two Battery Questions

We often set our sights on price, weight, figure and configuration when we purchase a new laptop. Battery is often ignored. In fact, battery and integral performance of a laptop are inseparable. Battery is as important as CPU, mainboard, hard disk etc. We list the tips and guideline below. Let's get the most of your lithium laptop batteries.

1. How to charge your new replacement laptop battery properly?

Some laptops with lithium-ion batteries use technology of SBS brightness battery system, which can measure battery's life accurately. Although lithium-ion battery has many merits, we still need to master some professional charge method to prolong battery's life and made it maintain long time power supply. Your new laptop battery requires three complete charge/discharge cycles before use and achieving maximum capacity. It means the battery would have to be charged fully and then be discharged fully. Repeat it three times before starting to use the dell laptop battery such as dell Inspiron E1705 battery, dell Inspiron 6000 battery(dell 6000 battery), dell Inspiron 9300 battery, dell Inspiron 9400 battery, dell 310-6321 battery, dell 310-6322 battery, dell D5318 battery, dell G5260 battery, dell G5266 battery, dell Latitude CPi battery,. By this way, battery's internal chemical materials can be activated and its internal chemical reaction can come into the optimal state. After the activation, the battery can be charged and used freely. But the battery will have to be discharged completely once a month so that the battery activity can be released by such deep discharge and battery life can be maintained.

If battery is idle for over 3 months, it is also necessary to conduct 3 cycles of complete charge and dsicharge to ensure that the battery is activated. You must control the charge time commendably when you use a Ni-MH battery. Please remember not to overcharge continually, or it will shorten the battery's life.

Furthermore, Ni-MH battery should be fully discharged before being charged. It also needs three complete discharge/ charge cycles before starting to use it. Most users are used to using Alternating Current instead of a battery for power supply when they use laptops. Actually the battery needs to be used at least once or twice per month to release the battery power completely. Then fully charge the battery with AC power once. Please remember that it is always good for rechargeable batteries to use up the battery power before giving them a full charge. Because the li-ion Battery used by laptop has its own laziness and would lose its activeness when being idle for long time. It needs to be reactivated.

It is suggested to take out the battery from laptop when it uses AC power supply indoor to avoid having the battery get charged frequently. It is also suggested to shut down the laptop so that battery can be fully charged. Do not remove the AC power during charge.

In addition, the power of battery can easily be used up and most laptops have only one battery. For this reason, some manufacturers have developed a fast charge feature that enables the battery to replenish its power at the fastest pace after power draining up. One hour charge can give the battery back over 90% of its power. Why is not 100%? Because frequent fast 100% charge will greatly shorten the battery life. In order to prolong battery life, fast charge will have to be switched to slow charge(namely Constant Voltage charging method) when battery reaches 90% charge.

For a common laptop, the best charge method is to turn off the laptop when its battery is being charged. The charge time will be shortened by 30% by this method.

2.what's the "memory effect" of battery? and how to clean out it?

Ni-cd batteries, and to a lesser extent Ni-MH batteries, suffer from what's called the "memory effect". What this means is that if a battery is repeatedly only partially discharged before recharging, the battery "forgets" that it has the capacity to further discharge all the way down.To illustrate: If you, on a regular basis, fully charge your Battery and then use only 50% of its capacity before the next recharge, eventually the battery will become unaware of its extra 50% capacity which has remained unused. The battery will remain functional, but only at 50% of its original capacity.

The way to avoid the dreaded "memory effect" is to fully cycle (fully charge and

then fully discharge) the battery at least once every two to three weeks. Batteries

can be discharged by unplugging the device's AC adapter and letting the device

run on the battery until it ceases to function. This will insure your battery remains healthy.

To avoid the best way to the memory effect

Welcome to a Laptop Battery specialist
of the Acer Laptop battery   First post by: www.laptop-battery-stores.com


1. When no external power supply, if at the time the work situation for the time being less than the PCMCIA card slot, first proposed in order to remove the card to extend acer BTP-43D1 battery , acer TravelMate 220 battery life.

2. At room temperature (20-30 degrees) for the best of battery temperature, the temperature is too high or too low operating environment will reduce battery life.

3. Can provide a stable power supply in an environment where the use of laptop computers, will remove the battery can be extended by the battery life is simply not true. ASUS notebook computer on, when the full power rechargeable batteries, rechargeable batteries in the circuit will automatically shut down, so will not have been sufficient.

4. Proposed a three-month average of battery power correction action.

5. To minimize the use of the number of Acer BTP-63D1 battery


The number of battery charging and discharging a direct bearing on the life of each charge a battery to retire a step forward. We proposed to make full use of external power supply,

6. The use of an external battery power will be removed.

Some users often several times a day in Plug Power, and notebook computers equipped with a battery, to do so, the greater the damage to the battery. Because each access to external power supply is equivalent to charging a battery, battery on the nature of the Zheshou.

7. Exhausted after the electricity charge and avoid charging time is too long

No matter your notebook to use nickel-metal hydride or lithium-electric power, it must be exhausted before sufficient power (electricity consumption of less than 1%), which is to avoid the best way to the memory effect. Li-electric memory will have the same effect, but its memory effect than Ni-MH small number of them.

8. Note the use of normal


Normally used to prevent exposure to prevent damp to prevent the erosion of liquid chemicals, acer BATCL50L battery , acer TravelMate 290 battery , acer TravelMate 4000 battery to avoid contact with metal objects, such as access to happen.

Laptop battery purchase Notes

The laptop battery life - as no more than 3-4 years, it may be in the process of users are most likely to be replaced. Two years later the use of laptop computers, battery consumption will find more and more rapidly. If possible, can replace the old batteries for new batteries to ensure the stability of the computer work.


When the need to replace notebook batteries, preferably with a selection of models to replace the battery. However, if the old computer is to use nickel-metal hydride batteries, in order for longer battery-powered, of course, can also be specified by the computer user's manual or manufacturer's recommended selection of models of lithium batteries. Although the nickel-metal hydride batteries because of cheap, but there is memory effect, but also in the same capacity next-to-weight ratio of lithium batteries, lithium batteries and have no memory effect, light and power for a long time, and other advantages, has become a laptop acer TravelMate 2300 battery standard . At this stage to use the notebook computer manufacturers of lithium acer Aspire 1680 battery btp-44a3, acer Aspire 1410 battery due to the different power supply in time there are certain gaps and friends in the process of selection should be noted that different brands of batteries in the difference between the best of several brands compare.

In addition to the performance of the battery manufacturers supply a statement of the time, but also pay attention to the needs of its capacity. Battery capacity is usually AH (ampere-hour, ampere hour) calculation of the current notebook computer equipped with the most common is about 4000AH, and ordinary cell can be sustained for more than 2 hours. In addition to the battery power supply by the time the whole Computer power and heat dissipation, and other factors, the screen size (the bigger the more power), screen brightness, as well as the implementation of the work of all time will affect the power supply .

Now the prices of notebook batteries in 1000 up and down the ocean, accounting for about notebooks to 10% of the total price - about some of the ultra-thin models and even higher. The battery warranty, security of 3 months, half a year of security, but also the longest for 1 year; The reason why the battery warranty period is short because the notebook battery supplies belonging to the vulnerable, the frequency of recharging is a constant, A small one. Moreover, the notebook acer LCBTP03003 battery ,acer Aspire 1300 battery and other hardware, there is no room for repairs can only be replaced. For such a long period of warranty products (OZ), were invisible on the increased burden on manufacturers, so the purchase of laptop before the battery must ask the warranty period and conditions.

In addition, the purchase of second-hand laptop when not forget to try its built-in battery can be sustained for a long time and more work. Under normal circumstances, used in 2012 after sufficient power in notebook computers, Ni-MH battery can be some support for the work of the computer about 1 hour, lithium-ion battery can support nearly 3 hours, but relative to the terms of this new battery The request is already very low, less than the battery indicator shows a view from near the end of life.

Notebook Battery of the causes of damage

Laptop acer BTP-APJ1 battery , acer BTP-AQJ1 battery , acer BTP-ARJ1 battery life is longer, often dissatisfied with the necessary and sufficient electricity, and even shows the battery has been damaged, the specific performance of the resistance is bigger in charge at both ends when the voltage rise faster. This charge was easy to control the line has been judged to be filled, the capacity of natural decline. As the larger battery internal resistance, discharge when the voltage drop, fast, so the system can easily mistaken for lack of voltage, less power consumption. Batteries found in the relatively short-time working hours, should take corresponding measures.