Lithium Ion Polymer Battery - 3.7v 100mAh : ID 1570 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Tenergy 14500 Unprotected Li-Ion Flat Top Battery
Li-Polymer Battery 3.7V 6000mAh
Lithium Ion Cylindrical Battery - 3.7v 2200mAh : ID 1781 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Li-ion battery 2100mAh 3.7V
Lithium Ion Polymer Battery - 3.7v 500mAh : ID 1578 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Xtar 14500 800mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Boxed
Amazon.com: LG LGIP-520B Lithium Ion Cell Phone Battery - Proprietary - Lithium Ion (Li-Ion) - 1000mAh - 3.7V DC - Non-Retail Packaging : Cell Phones & Accessories
Lithium Ion Polymer Battery Ideal For Feathers - 3.7V 400mAh : ID 3898 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: HXJNLDC DC 3.7V 2600mah 505573 li-ion Lithium Ion Polymer Battery Replacement for DIY Tablets Battery 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Electronics