| Subject | English | Spanish |
| comp., MS | backup battery | batería de reserva (An additional battery source available in Windows Mobile powered devices. It avoids data loss if the primary battery loses power) |
| el. | backup voltage storage battery | batería de almacenamiento de voltaje de reserva |
| IT | battery backup | reserva por batería |
| el. | battery backup | reserva de baterías |
| IT | battery backup board | tarjeta de batería de reserva |