NEC IP4WW-Battery Box - BE110239

Connected to each Chassis power supply, the external backup battery provides DC power in case a loss of AC power occurs. An optional (locally procured), external battery source can be used to provide power during a power failure – Connect this box to the power supply at each Chassis – Wall/floor-mountable – Backup duration is approximately one hour per chassis – Battery itself is local procure (12 V, 7 AH x 2 pcs of GS Yuasa NP7-12) https://www.nec-enterprise.com/