Good Qulity Liter Energy Battery 3.7v,2500mah,603090 Polymer Lithium Ion / Li-ion Battery For Toy,power Bank,gps,mp3,mp4 - Digital Batteries - AliExpress
18650 2500mah Battery - 3.7V– Eliquid Base
3.7V Rechargeable Li Polymer Battery LP855055 2500mAh With PCM and Wires
18650 3.7V 2500mAh Li-ion Rechargeable Battery
Lithium Ion Polymer Battery - 3.7v 2500mAh : ID 328 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits