Universal Power Group 6V 4.5AH SLA Battery Replacement Lil Rider FX 3-Wheel Motorcycle UPG #D5733 UB645 6V 4.5Ah Dimensions: 2.78 inches x 1.88 inches x 4.18 inches. Weight: 1.59 Lbs SLA/AGM maintenance free, spill proof battery Rechargeable battery that can be mounted in any position, resists shocks and vibration 1 Year Warranty