APC Back-UPS ES 8 Outlet 550VA BE550R Compatible Replacement Battery by UPSBatteryCenter 100% Guaranteed Compatible Battery for the APC BackUPS ES 8 Outlet 550VA Compatible UPS model: BE550R (Check the model #) Arrives fully charged and ready to go - (1) Year Replacement Warranty! Exact fit, Easy Installation - Plug & Play Manufactured & sold exclusively by UPSBatteryCenter