Lithium Ion Polymer Battery - 3.7v 150mAh : ID 1317 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: EEMB 3.7V Lipo Battery 300mAh 602030 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector Make Sure Device Polarity Matches with Battery Before Purchase!!! : Health & Household
Cheerwing 3.7V 650mAh Lipo Battery (4PCS) with 4 In 1 Battery Charger for Syma X5SW X5 X5C X5C-1 RC Quadcopter Drone Parts - Walmart.com
Custom Small Rechargeable 3.7V Lipo Battery BZ 402030 200mAh Li-polymer Battery for GPS Tracking Device