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Laptop Batteries
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Every laptop computer requires a battery. The battery is what makes it possible for the computer to be used from virtually any location, without having to be plugged into a wall outlet. Laptop batteries, like other batteries, come in many different shapes, sizes and capacities. In some cases, the battery is specific to the computer and can only be replaced through the original manufacturer, while in other cases there are several different options.
If the battery on your laptop computer is only giving you a fraction of the work time that it once did, it's probably time to switch the battery. When looking for replacement laptop batteries, it is extremely important to know the exact make and model of your computer, as this will make it much easier to find the right battery. Most computer retailers, online and local, will be able to supply you with a replacement battery. However, in most cases, online retailers will have a much better selection and range of prices.
Most laptop batteries in today's computers are lithium-ion. This type of rechargeable battery is preferred because of the longer work times they provide, as well as their longer lifespan. These batteries offer a higher energy density than any other type of battery material and the chemical reaction that creates the power current does not suffer from the “memory effect”. This means that the batteries do not need to be completely run down before charging in order to remain effective. However, due to the microprocessor they require to monitor their charge/discharge, these lithium-ion batteries tend to be more expensive.
Older computers were normally powered by Nickel Metal Hydride (Ni-MH) laptop batteries. These batteries can still be found, but more often have to be found online due to their decreased demand. NI-MH batteries replaced the older Nickel Cadmium (Ni-Cd) batteries because like lithium-ion, they did not suffer from the memory effect, and the Ni-MH batteries were also less toxic than the Ni-Cd batteries.
Laptop batteries can vary in the amount of working time they provide, much of which depends on the way your “drive” your computer. A computer that is have to work hard (i.e., running multiple programs, etc.) will inevitably use up battery power faster than a computer than is doing a minimal amount of work. Furthermore, many computers have user control settings that allow the user to optimize their battery life. Using the CD/DVD drive, or keeping your monitor brightness on high, can also have a significant impact on the working time allowed by the battery.
A typical lithium-ion battery will last about 2-3 years on average. After that you will probably start to see shorter working times between charges. Once these batteries have been worn out, it is necessary to replace them, as they cannot be brought back to life. However, their life can be extended by following some simple guidelines like avoiding full discharges whenever possible and by keeping the battery cool.
Lastly, if you're going to buy a replacement battery it is essential to buy a “new” battery. That means checking the manufacturing date and not buying a battery that has expired, no matter how good of a deal the store is offering.
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