Other than plugging them in to charge, is there a way to "turn off" the Beats Flexes? I just got mine the other night, they were at 99% charge when I went to sleep and when I woke up they had drained all the way down to 19%! Do I have to unpair them from everything to get them to stop draining battery? I didn't have my phone or iPad playing any music or anything last night while I was sleeping.