In charging, first charger’s charging plug insert Electro-tricycle’s charging socket. Now, batter’s indicator is light. Then connect the power to the -220v electricity, reopen the current regulator switch, at this moment, the power indicator light on and the ammeter has reflection. After finishing charging, you should pull out the power, plug first, then pull out the charger plug, you should put the charger in a ventilated and dry place.