For the replacement battery please see qf 242949 key features product description apc back ups es 400 ups 400 va input voltage ac 230 v output voltage ac 230 v 5060 hz power capacity 400 va output connector 4 x power bs 1363 surge 4 x power bs 1363 upssurge features battery failure notification provides early warning fault analysis on batteries enabling timely preventive maintenance resettable circuit breaker easy recovery from overloads no need to replace a fu