More and more toothbrushes use wireless induction charging, because toothbrushes usually need to be washed all over the body, induction charging is hidden in the toothbrush inside the coil to receive charging current, you do not need to reserve interfaces like USB charging, better water resistance.
However, this charging method has obvious shortcomings, takes a long time, generally takes 20 hours to fill, is simply anti-human design, and the base is inconvenient to carry.