The APC Smart-UPS SRT 96V 3kVA RM Battery Pack (SRT96RMBP) is a maintenance-free, spill-proof, sealed lead-acid battery with suspended electrolyte for APC Smart-UPS UPSs. APC Smart-UPS instantly switches the computer's power supply to a backup battery, allowing it to continue working during short power outages or to perform a planned shutdown during longer outages.