Oct 11, 2017
I was going to post the same question. I kept it charging all night, and it still shows a blinking red light. When disconnecting and turning power on, nothing happens.
Dec 15, 2016
Thanks for posting. Sorry to hear about your QC20. If you are charging your headset and the battery doesn't seem to hold the charge, I would recommend contacting your local Bose support. Here is a link you can use. Click on your country, scroll down to "Contact Us"
Hope that helped