NiCd Battery Pack: 7.2V 700 mAH for RC Cars: Nikko / Radioshack etc
Nikko 4.8v 600mAh battery pack and charger
Amazon.com: Fielect 2Pcs JST-2P USB Charger Cable 7.2V 250mA for RC Car Toy Ni-MH Ni-CD Battery Charger : Tools & Home Improvement
Amazon.com: 7.2V 2400mAh Rechargeable Ni-MH Battery AA Battery Pack with Standard Tamiya Connector for RC Car RC Truck Household Appliances 2 Pack with USB Charger : Toys & Games