Having checked other sources and emailed with JBL, the problem seems to stem from the battery expanding. I am on my 2nd unit now. 1st had the button issue. I use 8 hours a day and used to keep it plugged into an iPhone charging brick all day and night. This probably caused the battery to get too warm and expand, putting pressure on the buttons and not letting them function. I now charge it until all the indicator lights are on then unplug it. I also then run it down to when the warning light comes on before charging again. Hope this helps. They are great units for the money.