Electronic Batteries Info

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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What does mAh mean when it comes to batteries?
 
mAh stands for Milliamp Hour, a technical term for how much power a particular battery will hold. Digital camera / Power tools / Laptop batteries with higher mAh values theoretically last longer without requiring a recharge, allowing you to take more photographs before you have to replace your batteries.It is recommended when placing batteries in a digital camera that their mAh values match. Otherwise, it is possible that one lesser mAh battery will drain before the others, causing extra strain on the remaining batteries or causing your digital camera to not work until all batteries are replaced.