The RB1290X4H UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries. The RB1290X4H contains four 12V/9Ah batteries, 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 into your CyberPower UPS system and is shipped with reusable packaging for delivering expired batteries to a suitable recycling center. The RB1290X4H comes with instructions, recycling information, and an eighteen-month warranty. Sealed Lead-Acid Battery Supplies high surge currents, provides robust power-to-weight ratios, and is cost-effective. Maintenance-Free Battery Fluid Never requires replacement. Leak-Proof Casing Protects the sealed lead-acid battery and prolongs battery life. User-Installable Cartridge Allows for quick and convenient installation; each cartridge is pre-assembled. Reusable Packaging Provides for conveniently delivering expired batteries to a recycling center. After installing the new cartridge, place the old one in the reusable packaging. OEM Certified CyberPower batteries meet or exceed original manufacturer specifications.