In addition to the current increase, the size of the charger is also a problem, in order to facilitate portability, we often prefer smaller chargers. However, the volume is smaller, the heat dissipation performance will be worse, and the requirements for electronic components are higher.
Take capacitors, high voltage capacitors in the case of maintaining the same capacity, the volume is getting smaller and smaller, and in terms of voltage and temperature is better, not enough voltage will breakdown the capacitor, not enough temperature will explode the capacitor.