Adafruit Lithium Ion Polymer Battery Ideal For Feathers - 3.7V 400mAh

Lithium-ion polymer batteries are thin, lightweight, and deliver powerful performance. Operating from 4.2V when fully charged to 3.7V, this 400mAh battery ensures approximately 1.9 watt-hours of energy.Featuring a genuine 2-pin 25mm long JST-PH connector, the smooth connection experience is guaranteed, eliminating the hassle of stuck cables. Its compact design fits seamlessly between the headers on a Feather, making it ideal for projects using a Feather Huzzah ESP8266 or an Adafruit FeatherWing OLED.Equipped with protection circuitry, this battery guards against over-charging and over-use, cutting out at 3.0V. It can also handle output shorts, but proper charging is crucial. Use a LiIon/LiPoly constant-voltage/constant-current charger at a rate of 400mA or less, with the option of our Micro Lipo charger for safety and efficiency. Please observe safety precautions: avoid using incompatible chargers, and do not short, bend, crush, or overheat. Ensure proper polarity alignment with Adafruit LiPoly/LiIon products to prevent damage. Ideal for safe, reliable energy needs.