Adopts spring pin interface design, suitable for series motherboards Onboard lithium battery charging chip, supports dynamic path switching, and more stable power supply Can communicate through 12C interface, measure battery voltage, current, power and remaining power and other parameters, and detect module working status in real time Onboard battery protection circuit, anti-overcharge, anti-over discharge, anti-overcurrent, anti-short circuit and anti-reverse connection indicator light balanced charging, stable and operation Onboard 3 21700 lithium batteries, can maintain longer standby time Note:due to different production batches, the appearance printing is different, which does not affect the use. Colour:As Shown Material:Plastic Package Contents: 1 * Power module 1 * Acrylic protection plate 1 * Power cable 3 * 21700 battery 1 * Screw kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.