Amazon.com: ExpertPower 6 Volt 4.5 Amp Rechargeable Battery (EXP645) 2 Pack : Health & Household
Amazon.com: Universal Power Group UPG UB645 6V 4.5AH SLA Sealed Lead Acid Battery - also Compatible with Kid Trax Disney Ride on Toy KT1123TR : Automotive
6 Volt 4.5 Amp Hour AGM Rechargeable Battery 6V 4.5AH F1 - Batteryplex