CyberPower RB1290 Replacement Battery Cartridge - 1 X 12 V / 9 Ah Sealed Lead-Acid Battery, 18MO Warranty

Delivers a long lasting charge with the capacity of 9000 mAh With 12 V DC battery, never run out of power and keep your UPS operational at all times Maintenance-free and has low self-discharge Once installed, it requires low maintenance