Wonderbooks charge with a micro USB cord. Plug the charger into the port on the bottom of the device. Each Wonderbook charges completely in one hour and averages 12 to 14 hours of play once fully charged.
A flashing red light indicates a low battery and less than one hour of play time left. While charging, you will see a flashing green light and a solid red light. The red light will turn off once the Wonderbook is completely charged.