Lithium Ion Polymer Battery - 3.7V 350mAh : ID 2750 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Common Sense RC ACDC-10A Charger + 2 x 11.1V 5200mah 50C | Mark Twain Hobby Center
RC Car Battery Charge Cable 4mm & 5mm Bullet Connector 2 in 1 12 or 24
Amazon.com: RACEPOW 7.4V Lipo Battery 5200mAh 60C 2S Lipo Battery Pack Hard Case Lipo with T Deans Connector for 1/8 1/10 RC Car RC Monster Truck Truggy Buggy (2 Packs) : Toys & Games