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Lithium Ion Polymer Battery - 3.7v 1200mAh : ID 258 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Lithium Ion Polymer Battery - 3.7V 70mAh | TinyCircuits.com
Amazon.com: 3.7V 5000mAh 115659 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector : Health & Household
3.7V 750mAh 503337 503540 Liter energy battery Polymer lithium ion / Li ion battery for mp3 mp4 smart watch speaker POWER BANK|Replacement Batteries| - AliExpress
Amazon.com: DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Electronics