PowerStar 12V 8.5AH Sealed Lead Acid (SLA) Battery for APC ES500 ES550 LS500 RBC110 RBC2 2 YEAR WARRANTY - 30 DAY MONEY BACK GUARANTEE Vision CP1290L - 12.00 Volt 9.00 AmpH SLA Battery AGM, 12V, 9.0AH L- 5.94 W- 2.56 H- 3.66 Terminal Type: T1/T2 SLA Maintenance free Longest life-cycle product on the market