Amazon.com: EEMB 3.7V Lipo Battery 300mAh 602030 Lithium Polymer ion Battery Rechargeable Lithium ion Polymer Battery with JST Connector Make Sure Device Polarity Matches with Battery Before Purchase!!! : Health & Household
Lithium Ion Battery Pack - 3.7V 4400mAh : ID 354 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
3.7V Rechargeable Lithium ion Battery LP18650A+ 3500mAh With PCM and JST XHP-2 Connector
Watson Lithium-Ion Battery Pack (3.7V, 1800mAh) for HD B-1801