Cartridge For Pr750Lcdrm1U, Pr1000Lcdrm1U. The Rb0690X4A 6V/9Ah (Qty - 4) 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.