The charge takes place overnight and the tablet is ready for use first thing in the morning. They help my aching feet feel better. I even ordered another pair but it was the same. Disappointing from such a (normally) quality, reliable shoe. In this dress you cannot see that which is fantastic! Assembling took a little gestimating but it came together pretty easily. However, this model may go back as they have eliminated the toe grip on insole at the bottom of toes. day. I have it mounted to my motorcycle right now but I?m going to get another one for my bicycle and quad. Other than that it would have been great.