battery backup

Definitions

General Science

  • noun the use of a battery to provide power to a volatile device such as a RAM chip to retain data after a computer has been switched off

Computing

  • noun a battery to provide power to volatile storage devices to retain data after a computer has been switched off

Electronics

  • The use of a battery to power a device or system when the main power fails or is interrupted. For instance, an uninterruptible power supply may provide the power needs of a device through brownouts and blackouts. Also spelled battery back-up.
http://www.dictionarycentral.com/definition/battery-backup.html