Yesterday my QC35 II ran out of battery so I plugged it to charge it, and when I unplugged it today, it said it was only at 10%. So I tried to charge it again, and I noticed the LED went instantly green, as if it were fully charged already. I had run into this issue a few months ago, and it got fixed as soon as I updated the software. So I tried doing that, and there was indeed an update that hadn't be done. But even after I got it up to date, it still wouldn't charge. Except now the LED is a bit different, it's alterning between yellow, green, and nothing at all, every 2 seconds or so. I tried to leave it plugged in despite the weird LED and use it after a while, it briefly worked and then just shut down after a few minutes. What can I do?