Very quickly heats the smartphone, so quickly turns off the charge (15-20% will charge and cut down),the capacity is clearly overstated. All this is difficult to measure and record on video, so did not open a dispute. In general, I realized that wireless charging shit in principle, their convenience is not worth the battery life, speed and predictability of charging. On the wire, this thing does not charge, so I threw it in a closet with unnecessary things. Take the usual powerbank.