| Subject | English | German |
| comp. | backup battery | Hilfsbatterie (Datenerhalt-Sicherung) |
| gen. | backup battery | Stützbatterie |
| comp., MS | backup battery | Sicherungsakku (An additional battery source available in Windows Mobile powered devices. It avoids data loss if the primary battery loses power) |
| tech. | backup battery | Pufferbatterie |
| comp. | backup battery | Sicherungsbatterie |
| el. | backup voltage storage battery | Notstrombatterie |
| tech. | battery backup | Batterienotversorgung |
| el. | battery backup | Batteriereserve |
| IT | battery backup | Batteriesicherung |
| tech. | battery backup | Batteriepufferung |
| tech. | battery backup | batteriegepuffert |
| busin., IT | battery backup | Notstromsicherung (mit Batterien) |
| gen. | battery backup | Notstromversorgung mit Batterien |
| law | battery backup | Absicherung der Stromversorgung |
| comp. | battery backup | Absicherung durch Batterie |
| comp. | battery backup | Batteriestützung |
| comp. | memory battery backup | batteriegestützter Speicher |