Lithium Ion Polymer Battery - 3.7v 100mAh : ID 1570 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Lithium Ion battery - 3.7V 4400 mAh
18650 Lithium-ion Rechargeable Cell - 2500mAh 3.7V 20A | The Pi Hut
3.7V Rechargeable Lithium ion Battery LP18650A+ 3500mAh With PCM and JST XHP-2 Connector
LI-ION BATTERY 500mAh
Polymer Lithium Ion Battery (LiPo) 3.7V 1100mAh | Core Electronics Australia
Amazon.com: FPVERA 3.7V 1200mAh Li-ion Battery 2PCS 3.7Volt Rechargeable Batteries with USB Charger Cable SM-2P Plug for RC Car Drift Monster Truck Off-Road Vehicle Remote Control Car High-Speed Climbing Racing : Toys