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Computer Charge
Just like any small AA, AAA or C battery, a laptop battery works by creating a electrochemical reaction that sends electrons between the negative and positive terminals. A laptop battery has some features exclusive to it. A laptop battery, for instance, is rechargeable, is composed of many internal cells, has a tiny printed circuit board and is shaped and located in various places depending on the model.
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A rechargeable
battery such as the one running your laptop is much more complicated
than the standard battery with no recharged capability because its
electrochemical reaction has to be reversible. If the process of
laptop battery use and electrochemical reaction isn't exactly right
build up could take place at either one of its terminals over an
extended period. Eventually this could cause a short circuit, which is
dangerous.
The many cells inside the laptop battery are set up in parallel and in
a series so that the laptop battery charge ends up with a higher level
of voltage than any individual cell. Its circuit board controls the
recharge of the laptop battery cells. The laptop battery won't work
correctly without the circuit board.
A laptop manufacturer designs its laptop battery pack to conform to
the particular laptop model's overall functionality. While some
laptops and their battery are designed for small size and light
weight, others are created to replace a desktop's functionality.
Because of this variation in laptop size, function and weight, there
is no one size or one shape fits all in the world of laptop battery
products.
Source:
http://www.laptopbattery.net/
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