CyberPower's RB1290X3R UPS replacement battery cartridge restores life to UPS systems with internal batteries that have become weak or completely depleted. The RB1290X3R 12V/12AH batteries are certified to meet or exceed original manufacturer specifications. All replacement cartridges come with leak proof sealed lead acid batteries that are pre-assembled for easy installation into your CyberPower UPS system. Each CyberPower replacement battery cartridge ships with reusable packaging that can be used for delivery of expired batteries to a suitable recycling center. Compatible with BP36V60ART2U (requires QTY 1 RB1290X3L and QTY 1 RB1290X3R)