BATTERY ABCs
There are thee main categories of computer batteries:
The first type of battery is the backup battery, which is commonly referred to as the “CMOS battery”. This battery is what holds your computer’s computer settings, such as the time and date. This allows your computer to remember basic computer settings and allows you to boot the computer without entering those settings each time you start the computer. Additional information about CMOS and the CMOS batteries can be found on our CMOS help page.
The second type of battery is the “bridge battery”. This battery is only found within portable computers and is used as a temporary backup for the main battery. This allows you to remove the main battery and replace it with a good battery without having to turn off the computer.
The third type of battery is the main battery. The main battery is also only used with portable computers and is used as an alternate source of power for when the computer is not connected to a standard wall outlet.
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