This is how the S-Pens on the Galaxy Notes work, they pull the power they need wirelessly from the phone/tablet. http://www.androidauthority.com/break-it-down-

This is how the S-Pens on the Galaxy Notes work, they pull the power they need wirelessly from the phone/tablet. http://www.androidauthority.com/break-it-down-how-does-the-s-pen-work-154435/ http://www.androidauthority.com/break-it-down-how-does-the-s... This stylus technology also convinced Samsung to buy 5% of Wacom.