CyberPowers RB0690X2 UPS replacement battery cartridge restores life to UPS systems with internal batteries that have become weak or completely depleted. The RB0690X2 6V/9AH (qty - 2) 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.