- Rechargeable LiPo battery model 402540, 3.7V and 350mAh, ideal for portable electronic devices. - Features 3 wires: red (positive), black (negative), and white (NTC thermistor) for temperature control. - Integrated PCM protection prevents overcharge, over-discharge, overcurrent, and short circuits. - Compatible with smartwatches, phones, digital cameras, GPS, MP3/MP4 players, lamps, and other electronic devices. - Not compatible with toys or radio-controlled vehicles due to its 5C discharge rate. - Compact size of 42x25x4mm, easy to install in electronics projects and portable devices. - Rechargeable with original or compatible charger, supports numerous charge and discharge cycles. - Memory effect-free technology, maintains performance throughout its lifespan.