Rechargeable batteries are used in a variety of devices. There are several
different types of batteries that use different technologies for different types
of devices. Three main types of
rechargeable batteries are 9
Volt, D, or AA and also AAA. But what to these letters mean and why are they
different?
A 9Volt battery is a rectangular battery used in small
consumer electronics. Rectangular is a shape used for most batteries which are 4
volt or higher, up to 12 volt. All batteries are made of cells, but the cells in
a 9 volt are connected in a series combination which makes the voltage rating of
the battery the sum of the voltage of the cells.
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