Lithium Ion Polymer Battery - 3.7V 70mAh | TinyCircuits.com
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
2S Smart Li-ion, Polymer Battery Charger - Portable Power Technology