The Tripp Lite EBP240V2502 external backup battery pack consists of two battery cabinets containing sealed lead acid batteries designed to give your Tripp Lite SV-Series UPS system more runtime. It uses a +/-120VDC configuration and must be hardwired to a compatible UPS system. You can also connect more battery packs in parallel to increase runtime even longer. A UL-listed DC circuit breaker protects against too much current. The EBP240V2502 is compatible with all Tripp Lite UPS models that begin with SV20, SV40, SV60, SV80, SV100, SV120 and SV140.