Xiaomi Cordless Pressure Washer’s battery pack has Type-C port. Open the cover on the charging port of the battery pack, and connect the Type-C cable to the charging port and a power source.The LED white light of the battery pack blinks when charging. The 4 LEDs are always white when fully charged and go out after 20S. Charging with an adapter of 40W or above, the fastest is about 80 minutes or so full.