Amazon.com: Amityke Battery Adapter,Power Wheels Adapter for Makita 18V/14.4V Battery BL1820, BL1830, BL1840, BL1850 with 14 awg Wires Power Convertor for DIY Ride On Truck, Robotics, RC Toys and Work Lights :
Makita 14.4 Volt Ni-Cd/Ni-Mh Battery - Rebuild Service To 3Ah - Power — The Battery World Shop