No harm was done.
Why does high voltage charging not burn out the machine? This is because the charging voltage is determined by the battery and its own charging protection IC, and has nothing to do with the charger voltage. used is 5V Yes, since the machine's charging protection circuit has limited the charging voltage to a safe range, it will not damage the battery. Some mobile phones also have a protective current circuit that will automatically cut off the charging circuit when excessive voltage is connected. .