POWERSTAR replacement battery Cartridge for UB1230 RBC35 APC Back-UPS ES BE350C / BE350R PowerStar Brand Batteries 2 year warranty For all SLA batteries - 3 YEAR WARRANTY WHEN USED WITH UPCS MACHINES AND FLOAT DEVICES 100% compatible - Advanced AGM Technology Sealed  Maintenance Free 12v 3.3 ah battery L-5.28 W-2.64 H-2.4