One type of RAM is battery-backed RAM.

Added applications and data files are stored in the internal battery-backed RAM; these can be loaded from and stored to an audio cassette tape recorder or external floppy disk drive.

Some file systems may also allow external journals on a separate device, such as a solid-state disk or battery-backed non-volatile RAM.

Data is loaded into the V64jr's battery-backed RAM from a PC via a parallel port connection.

Cartridge-based systems primarily used battery-backed volatile RAM within each individual cartridge to hold saves for that game.

The real time clock and the battery-backed RAM draws power from an external 4.5 volt battery pack.

The battery-backed RAM was primarily used to store system configuration information.

Chrono Trigger used a 32-megabit ROM cartridge with battery-backed RAM for saved games, lacking special on-cartridge coprocessors.

The cartridge utilises battery-backed RAM to save a player's progress.

The Indy's Ethernet address, which doubles as the system's serial number, is stored in battery-backed RAM.