How do laptop batteries work

Bei Verwendung eines Akkus von Fremdherstellern oder eines ungeeigneten Akkus kann die Brand- oder Explosionsgefahr zunehmen. Laden Sie Akkus vor der Lagerung auf. Der Test wird automatisch gestartet. Wann sollte ich in Betracht ziehen, den Akku zu ersetzen? Kann ein Dell Akku zu stark aufgeladen werden?

Wie kann ich einen Dell Akku in einen Dell Laptop einbauen? Wie kann ich einen nicht von Dell stammenden Akku in einen Dell Laptop einbauen? Wo gibt es Dell Akkus zu kaufen? Maximieren der Laptop-Akkulaufzeit. Although all batteries are not created equal, they all have the ability to turn chemical energy into electric current to power electronic devices -- from tiny digital music players to big notebooks.

As with the battery in a car, a chemical reaction inside a notebook's battery frees electrons to flow from the positive terminal to the negative terminal, creating enough current to run the device. That was then The old-timer of mobile battery technologies is the nickel-cadmium cell NiCd , once the mainstay of notebook design. Unfortunately, NiCd cells can only carry enough power to run a system for about an hour, and they contain toxic cadmium, which makes them hard to dispose of.

And despite their ability to be recharged about 1, times, nickel-cadmium cell batteries also suffer from something called 'memory effects'; over time, they lose the ability to hold a complete charge. Luckily, lighter and more powerful battery designs have surpassed the NiCd, and today, NiCds are used mostly in toys and inexpensive cordless phones.

About a decade ago, most notebook makers switched to nickel-metal-hydride batteries NiMH. Not only can these batteries hold about 40 percent more power, they aren't as susceptible to memory problems as NiCds are, and they are more environmentally friendly. On the downside, you can recharge them only about times versus charge cycles for newer designs. This is now Today, the lithium-ion cell also known as Li-ion , which holds roughly twice the capacity of a nickel-cadmium battery, rules the notebook battery roost.

Used on most notebooks, handhelds, and mobile phones, lithium-ion technology can hold a lot of power, but its exotic materials make it expensive. Part of the credit for its success goes to a tiny controller chip embedded in each battery that adjusts how quickly the battery discharges and prevents it from overcharging.

Coming soon Look for lithium-polymer Li-poly technology to make its way into mobile phones, handhelds and notebooks in the near future. Extremely light and malleable, these batteries are capable of providing nearly as much power as lithium-ion cells but can also be shaped to fit into a device's hidden nooks and crannies. For a look at another battery technology, check out the next section on fuel cells. Batteries versus fuel cells The traditional battery's days may be numbered.

Thanks to recent advances in fuel-cell technology , your next notebook or maybe the one after that could run for days on a single charge. These next-generation batteries, which contain chemicals such as methanol stored in small tanks, certainly aren't your average power source. More like tiny chemical plants, different types of fuel cells are currently used in space shuttles, experimental eco-friendly cars and small power plants.

NEC is developing a fuel cell for a notebook that could provide a mind-boggling 40 hours of battery life. So how does a fuel cell work? Methanol, or methyl alcohol, is NEC's fuel of choice, and Kubo has created a prototype notebook that can run for five hours on about a pint of 10 percent fuel. When the tank is dry, forget about a power cable, because the fuel cell wants more methanol. Just pour in a small bottle of fuel, and it's ready to go. Rather than carrying a bagful of batteries on a long flight, all you'd need is a bottle of methanol -- but be careful: methanol is a poison.

For now, packaging is the biggest obstacle that fuel cells face. According to Kubo, NEC is attacking this problem from three directions: upping the concentration of methanol; using a low-power processor; and increasing the tank size. Fuel-cell-powered handheld By contrast, Hitachi is thinking smaller. Along with Tokai, a Japanese maker of cigarette lighters, Hitachi is working on a fuel cell-powered handheld. About the size of a AA battery, the fuel cell contains 57g of 20 percent methanol fuel, and it powers a handheld computer for 6 to 8 hours.

Before its planned launch which was originally slated for but has since been pushed back , the companies will try to boost runtime by using 30 percent methanol fuel, making a hour handheld a distinct possibility.

All this adds up to big business over the next decade, according to Daniel Benjamin, a marketing analyst at Allied Business Intelligence, based in Oyster Bay, New York. Despite this, he says that by there could be million fuel cells of all sizes and capacities sold, powering everything from MP3 players to notebooks.

By then, we may be able to kiss our batteries goodbye, along with the eternal search for a power outlet to charge them -- although finding fuel may create another problem. Power and performance The notebook you buy may help determine the amount of uptime you can expect on an air flight. How come?

Even though the CPU consumes about half the notebook's total power, recent advances in processor technology have eased the burden placed on a system's battery. Now, thanks to Intel's Core Duo and Centrino technology, for instance, notebooks can run faster and longer on the same batteries they used to use.

Here's the low-down on which processors let notebooks last the longest. With two processor cores, two megabytes of Level 2 cache, and the ability to streamline operations, it balances raw power with extensive battery life. Running at up to 2. Intel Core Solo Intel's Core Solo processor is very similar to the Core Duo, however, it uses single as opposed to dual processor cores.

This results in decreased raw performance, but it also means that the chip consumes less power -- 5. The Core Solo runs at speeds of up to 1.

Like Intel's version, it offers two processor cores for increased performance whilst multi-tasking. The number of charge cycles of the battery will depend on the usage of the laptop. The more often you need to charge your laptop the sooner you will have to replace the battery. Every laptop model is designed to suit a particular function and so is the battery designed to match the power requirements of the laptop.?

The design of the battery depends on the weight and size of the laptop. A small light-weight laptop will have its design defeated if the battery weighs more than the laptop itself, so the battery has to be designed to suit the model of the laptop. Editorials » Technology » Laptops ». How Does a Laptop Battery Work? Most Popular. Lg Mobile Phones Information.

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