Another power supply with charging function to the battery charging, but also need to have a machine with charging protection, that is to say, the battery is placed on the machine, the machine to charge the battery, equivalent to the function of the seat charger, if there is no seat charger, the battery can be charged. That is to say, the battery is placed on the machine, the machine to charge the battery, equivalent to the function of the seat charger, if not this function is not charging p>