Lithium Ion Polymer Battery - 3.7v 100mAh : ID 1570 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: PKCELL ICR10440 Lithium Ion Rechargeable Battery 3.7V 350mAh with USB Charger (2pc Button top +Charger)(They are not AA Size Battery) : Health & Household
22650 Li-Ion battery 3.6V - 3.7V with 3000mAh capacity and 15A discharge current | akkuteile.de
Li-Polymer Battery 3.7V 2000mAh
3.7V 1800mAh Lithium Polymer Rechargeable Battery with JST 1.25mm 3pin connector For MP3 camera GPS 803450 Corsair Void Pro
Amazon.com: Blomiky 3.7V 1200mAh 2 Pack Li-ion Rechargeable Battery with SM2P Plug and Charger Cable for Remote Control Cars Trucks 3.7V 1200mAh 2 : Toys & Games