Main Features:Manufacturer: American Battery Company Manufacturer Part Number: RBC2Battery Type: Maintenance Free Lead-acid Hot-swappableBattery Life: 3Year(s) to 5Year(s)Dimensions: 3.66 Inches Height x 2.56 Inches Width x 5.94 Inches DepthWeight: 7 lb Replacement for APC UPS: BK250B, BK280B, BP280, BP280B, BP280S, BP280BPNP, BP280PNP, BP280C, BP280S, BK300, BK350, BP350, BP350U, BK400, BK400B, BP420, BP420C, BP420PNP, BP420S, BP500, BP500CLR, BP500U, BK500, BK500M, SU420VS, SU420NET, PCPER, PCPRO, BK500MC, SUVS420, BP280SX116, BP4201PNP, SP500DR, BP500UC, BP2801PNP, BK300C, BK300X116, BK500MC, BE500R, BE500V, BK500BLK, BP350UC, BP420IPNP, SP500DR, SC420, BE500RPlease Note: For any BK200 or BK200B, please verify battery configuration before purchasing. To verify, open the battery door and check the number of batteries inside the unit. If your unit has one battery, you will need (1)RBC2 unit. If your unit has two batteries, you will need (1)RBC1 unitStandard Warranty: 2 Year(s) Limited