The RB1290X2E UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries. The RB1290X2E contains two 12V/9Ah batteries, certified to meet or exceed original manufacturer specifications. This leak-proof, sealed lead-acid battery cartridge never requires replacement fluid. The pre-assembled cartridge installs easily into your CyberPower UPS system and is shipped with reusable packaging for delivering expired batteries to a suitable recycling center.UPS CompatibilityCP1500AVRLCD3, CP1350AVRLCD3, BRG1500AVRLCD2Sealed Lead-Acid BatterySupplies high surge currents, provides robust power-to-weight ratios, and is cost-effective.Maintenance-Free Battery FluidNever requires replacement.Leak-Proof CasingProtects the sealed lead-acid battery and prolongs battery life.User-Installable CartridgeAllows for quick and convenient installation; each cartridge is pre-assembled.Reusable PackagingProvides for conveniently delivering expired batteries to a recycling center. After installing the new cartridge, place the old one in the reusable packaging.OEM CertifiedCyberPower batteries meet or exceed original manufacturer specifications.