Adafruit Industries - 328 - Lithium Ion Polymer Battery,Rechargeable,3.7 V,2.5 Ah,2x2.55x0.3"(51x65x8mm) - Allied Electronics & Automation, part of RS Group
New High Capacity LiPo BATTERY 3.7V 1800mAh 15C for Adafruit and Drone Building | eBay
Adafruit Battery Packs Lithium Ion Polymer Battery 3.7V 1200mAh (1 pie – kjdElectronics