Lithium Ion Polymer Battery - 3.7V 2500mAh | TinyCircuits
Buy 10PCS/lot ICR18650 3.7V 1200mAh Lithium rechargeable battery for Flashlight LED light Headlight at affordable prices — free shipping, real reviews with photos — Joom
Lithium Ion Battery Pack - 3.7V 6600mAh : ID 353 : $24.50 : Adafruit Industries, Unique & fun DIY electronics and kits