CyberPower RB0690X4A Replacement Battery Cartridge, Maintenance-Free, User Installable Genuine CyberPower replacement battery cartridge. Tested and certified for compatibility to restore UPS performance to the original specifications. Maintenance-Free. Leak proof sealed lead acid battery. 18 month warranty Reusable package for delivering expired batteries to a suitable recycling center User Installable. Pre-assembled for easy installation. Compatibility: PR750LCDRM1U, PR1000LCDRM1U USE ONLY GENUINE CYBERPOWER REPLACEMENT BATTERIES! Buy only if the product says "Ships from and sold by Amazon.com"