Amazon.com: Liter 3.7V 2000mAh 804050 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST 2.0mm Connector : Electronics
3.7v 2000mah 102560 Lithium Polymer Rechargeable Battery Accumulator Li Ion Lipo Cell For E-book Power Bank Diy Tablet Pc - Rechargeable Batteries - AliExpress
Lithium Ion Battery - 3.7V 2000mAh : ID 2011 : $12.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Li-Polymer Battery 3.7V 2000mAh
PKCELL Flat 3.7V 2000mAh Rechargeable Lithium Polymer 803860 Battery with Lead Wires