65w charger can not charge 15w, this is because the rated power of 65w charger is larger than the rated power of 15w battery, the rated power of the two phases does not match, if the 65w charger is used to charge 15w, the high voltage of the 65w charger will burn out the 15w battery, so the 65w charger can not charge the 15w battery. Instead, choose a charger that matches the 15w battery
It's charged. It's a slow 15w