The CyberPower RB1290X4K UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries; It comes with four 12V/9Ah sealed lead-acid batteries SEALED LEAD-ACID BATTERIES: Supplies high surge currents, provides robust power-to-weight ratios, and cost effective; MAINTENANCE-FREE BATTERY FLUID: Never requires replacement USER-INSTALLABLE CARTRIDGE: Allows for quick and convenient installation; each cartridge is pre-assembled; The RB1290X4K comes in reusable packaging for delivering expired batteries to recycling centers Compatible with these CyberPower models: PR2200LCDSL, PR3000LCDSL