You can't use high voltage to activate the lithium battery, because the protection voltage of its protection board has upper and lower limits. The high voltage will burn out the mos tube on the protection board. The activation of the lithium battery needs to directly connect the positive and negative terminals of the charger to the battery. The positive and negative poles are charged. When the voltage rises to the lower line voltage of the protection board, the protection board will work normally and normally charge and discharge.