CyberPower RB1270X4C Replacement Battery Cartridge, Maintenance-Free, User Installable Certified OEM replacement battery for CyberPower UPS Maintenance-Free. Leak proof sealed lead acid battery Reusable package for delivering expired batteries to a suitable recycling center User Installable. Pre-assembled for easy installation. Compatibility: OR1500PFCRT2U (With serial numbers beginning with GAN or GAS) 18 Month Warranty