Lithium Ion Polymer Battery - 3.7v 500mAh : ID 1578 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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3.7 V 1200mAh Lipo Battery LP603450 | Lipolybatteries.com
Amazon.com: SOCOKIN Lipo Battery 3S 11.1V 5200mAh 60C with Deans T Plug Soft Case for RC Car Model, RC Racing Car Heli Airplane Quadcopter Helicopter etc (2 Pack) : Toys & Games
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