CR2032
From Sega Retro
CR2032 battery
CR2032 is a designation for a small 3-volt battery about the size of a nickel, very commonly used as the battery for supplying power to SRAM chips to prevent them from losing the stored information when the console is turned off.
It's a very popular battery and in case you ever need to replace an ailing CR2032 they're sold at most electronics stores.
Uses of the CR2032
- Dreamcast Visual Memory Unit
- Sonic the Hedgehog 3 cartridge
- Sega Saturn Internal Backup RAM
- Neo Geo Pocket