In my case my JBL clip 2 started flashing from red to blue light and not responding at all ... I tried pressing the play/pause button for even more than 1 minute and nothing. I plugged into a wall charger and nothing. The only thing that fixed it was to leave it until lights were no flashing anymore because they consumed all the battery ... then I plugged into a wall charger and it looks like it restarted and now it is working perfectly again !