Definitions from Wiktionary (battery-backed)

▸ adjective:  (electronics, of a device) Using a battery to maintain operation when not powered by the main electrical supply (e.g. during a blackout).
▸ adjective:  (electronics, computing) Using a battery to maintain volatile memory when powered off.
▸ adjective:  (video games, of saved game data) Written to a volatile memory chip in a video game cartridge to maintain the data when not in use.



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