3.7V Polymer Lithium Ion Battery — 1000mAh

The Polymer Lithium Ion Battery 3.7V 1000mAh is a rechargeable lithium cell with a JST connector, designed for portable electronics, wearables, IoT devices, and maker projects. Pair it with a LiPo charger like the TP4056 or Adafruit Micro Lipo.

Safety: Lithium batteries can be dangerous if punctured, short-circuited, or overcharged. Always use a proper LiPo charger with protection circuitry.

3.7V battery size guide

Capacity	Best for
105–150 mAh	Tiny wearables, coin-cell replacements
350–500 mAh	GPS trackers, small IoT sensors
850–1200 mAh	Handheld devices, Feather boards
2000–2500 mAh	Phones, tablets, Raspberry Pi portable
4400–6600 mAh	Extended runtime, power banks