Replacement UPG 12V 18Ah CB19-12 Sealed Lead Acid AGM Rechargeable Battery 12V 18AH SLA AGM type. L-7.13 in W- 3.00 in H- 6.6 in Weight 12.5 lbs per battery Acceptable for use with Scooters, Back Up power etc. 3 YEAR FREE REPLACEMENT WARRANTY