Amazon.com: PKCELL ICR18500 Battery 3.7V 1400mah Li-Ion Rechargeable with Button Top 6PC(They are not 1865mm Batteries Also Not AA Size Battery) : Health & Household
Lithium Ion Polymer Battery Ideal For Feathers - 3.7V 400mAh : ID 3898 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Lithium Ion Polymer Battery - 3.7V 1500mAh
18650 Li-Ion Battery 3.7V 5800mAh – CreateLabz Store
5mm Ultra Thin 95mAh Hot Selling Small LiPo Battery LP500829 3.7V | Polybattery.com
Amazon.com: EEMB Lithium Polymer Battery 3.7V 1500mAh 103050 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase : Health & Household