Amazon.com: DC 3.7V 1300mAh 503759 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Health & Household
EBL 8-Pack 16340 Li-ion Rechargeable Batteries 750mAh 3.7v CR123A Battery for LED Flashlight Torch - Walmart.com
18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh | xUmp.com
3.7V Lithium Polymer Battery Cell Manufacturers and Suppliers based in China