Plug the charger into an electrical outlet.
Connect the charger to the pen by inserting the charging end of the charger into the charging port on the pen. You should see the charger light turn red and the pen light turn green, indicating that the pen is charging.
Leave the pen to charge until the charger light turns green and the pen light turns off. This usually takes a few hours, depending on the battery level of the pen.
Once the charger light turns green and the pen light turns off, the pen is fully charged and ready to use.
It's important to note that you should only use the charger that came with your pen, as using a different charger could damage the pen or cause it to malfunction. Also, be sure to keep the pen charged when not in use to ensure it's always ready when you need it.