Oct 7, 2018
I just came to the Bose website to search for this problem and indeed it appears to be a manufacturer defect! Quite surprised that this is how they have chosen to deal with it but not honoring the supposed quality of their product. I would not have expected this from Bose. I will make one attempt at their store in person and hope to get a positive response. If not we should all publicize this poor customer service, because clearly this is a product defect.
Oct 10, 2018
My Bose QC-35 keeps turning on by itself. Very annoying! Don't know what to do. I tried what you have suggested but it doesnt help. Can anyone help? How long is the warranty? Can I get a prorated rebate to buy new ones?
Oct 11, 2018
Small part of me is glad to see that I'm not the only one experiencing this. Larger part of me is very disappointed that Bose apparently refuses to acknowledge that there's an obvious hardware defect with the QC35's. My first Bose headphones were QC2's, and they served me faithfully for years, and I was proud to tell people how happy I was with them. Eventually ended up getting the QC35's in 2016 & was looking forward to several years with the updated model. After barely 18 months, they're essentially worthless as the battery is always running down. Sad.
Will try one final firmware update. If that doesn't help, Sony will have a new customer.
Apr 23, 2016
I've had QC 35 for a little over a year with less than 24 hours of use, which made it difficult to believe it's a defective device like it appeared. I was concerned because even though they're "like new" it was pass the warranty by a month or two.
Having experienced the same issue for awhile now I finally reached out to Bose support and was fortunate to speak with a rep that was aware of the problem.
Discovered that it's not a defective headphone/hardware issue, but actually a firmware issue when having more than one bose bluetooth product plugged in..
I guess it was meant as a "feature" for their bluetooth products to turn on and connect automatically..
Was also told the developers are working on fixing it and hopefully should have a fix in the relatively near future.
Bose support recommended (as a temp fix) to unplug all other Bose bluetooth products, which for me was a SoundTouch speaker. The SoundTouch speaker had similar issues (auto turn on) and they said that would be fixed as well.
There is also an alert setting in the Bose Connect app to have the headphones turn off after 5+ minutes. It's called something like "Stand by Alert". This didn't work for me so I just unplugged the SoundTouch and seems to have stopped turning on by itself.
So, it's not a hardware problem, just a very frustrating one that they've been slow at accepting as a bug instead of a feature.
Hope this helps.