The RB1290X3R UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries. The RB1290X3R contains one 12V/9AH battery, certified to meet or exceed original manufacturer specifications. This leak-proof, sealed lead-acid battery never requires replacement fluid. The pre-assembled cartridge installs easily in your CyberPower UPS system and is shipped with reusable packaging for delivering expired batteries to a suitable recycling center.