The digital pen does not need to be charged, because the digital pen uses a passive pen, there is no need to charge, and the digital board is equipped with a data connection line. Current digital pens do not need to be charged, and can be dialed on or off. It's the pen that goes with the digital board. There is a driver's program disk in the digital board box, which may be broken when you remove the pen, such as the pen holder and so on, and it is plugged into the computer.
Because it is electromagnetic induction, the digital pen does not need to be charged.