The G Pen Gio Battery is charged by plugging the included micro USB cord into the bottom of the unit’s battery, as well as an acceptable USB port or AC adapter. The “G” light on the front of the unit will light up, indicating the battery is being charged.
If you have any further inquiries, please contact our Customer Service Department anytime Monday through Friday, 8:00am to 5:00pm PST.
Email: help@grencoscience.com
Phone: (800) 948-7480