12V 7.4AH / 12V 8.0AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500 RBC110 RBC2 Beiter DC Power High Capacity SLA Batteries Voltage: 12V (12 Volts) Capacity: 8Ah Battery Life 3-5 Years Under Normal Conditions 1 Year Warranty!