REPLACEMENT BATTERY CARTRIDGE Main Features:Manufacturer: American Battery Company Manufacturer Part Number: RBC21Battery Type: Maintenance Free Lead-acid Hot-swappableBattery Life: 3Year(s) to 5Year(s)Dimensions: 5.5 Inches length x 1.9 Inches width x 4 Inches height1 maintenance-free sealed lead-acid batteriesWeight: 4 lb Replacement for APC UPS: BF500, BF400C, BF500V, BF500BBStandard Warranty: 2 Year(s) Limited