CyberPower RB1280X2A Replacement Battery Cartridge - 2 X 12 V / 8 Ah Sealed Lead-Acid Battery, 18MO Warranty

Delivers a long lasting charge with the capacity of 8000 mAh 12 V DC battery ensures a steady and constant electric supply to UPS Solution for a battery that is about to expire, so you can replace it whenever needed Once installed, it requires low maintenance