Lithium Ion Battery Pack - 3.7V 6600mAh : ID 353 : $24.50 : Adafruit Industries, Unique & fun DIY electronics and kits
INVENTO 5V 1000 mAh Polymer Ni-mh Rechargeable 4 AA Cell Battery Pack for Cordless Phone Toy Car DIY Project : Amazon.in: Electronics
Rechargeable lithium polymer battery pack 9000mAH 5V with USB port, for power bank
INVENTO 5V 1800 Mah Polymer Ni-Mh Rechargeable 4 Aa Cell Battery Pack with 5. 5Mm Dc Jack Adaptor Port for Uno Toy Car Diy Project : Amazon.in: Electronics