Amazon.com: E-outstanding 3.7V Lithium Battery Balance Charging Line USB to XH2.54 Connector and XH2.54 to JST Convert Line for RC Aircraft Drone : Health & Household
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits