I think the idea is that you aren't going to listen to more than 5 hours straight - so you put them back in the case in between and they get recharged while in

I think the idea is that you aren't going to listen to more than 5 hours straight - so you put them back in the case in between and they get recharged while in the case, in your pocket. Then you plug in the case at night along with your phone and watch. If you want to listen to 6+ hours of audio straight, then you'll have to use something else. Making people get into the habit of always putting them back into the case when not in use should also reduce the likelihood of loosing them.