system
A chat on subreddit /r/pcmasterrace
human
It's a small coin cell battery (commonly a ~~CR2106~~ CR2032) directly on the motherboard which allows the motherboard to maintain time while it is turned off or unplugged. The battery generally lasts for the lifetime of the computer but it may need to be replaced when dealing with very old computers.
gpt
Since when is it CR2106 instead of CR2032?