Lithium Ion Polymer Battery - 3.7V 350mAh : ID 2750 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Matrix High Performance 11.1V Stick Type Airsoft LiPo Battery (Configuration: 1250mAh / 20C / Small Tamiya) - New England Airgun Inc
Amazon.com: Evike Airsoft - Matrix High Performance 7.4V Stick Type Airsoft LiPo Battery (Configuration: 1000mAh / 20C / Small Tamiya & Long Wire) : Sports & Outdoors
2x DS602035 3.7V 350mAh LiPo Battery For small RC Drone | eBay
Amazon.com: Kingin 10ea 150mAH 3.7V 5X20X20mm Small Rechargeable chice Lithium Battery with PCM and Wire 502020 LiPO Battery no Connector : Health & Household