So today I was wearing my Bose QC35 IIs back home and forgot to switch them off after using them, and I put them back in the carrying case. 3 hours later I realized I didn’t turn the switch off and it was turned on at HIGH noise cancellation for 3 hours straight. Would there be any problems with the sound quality or noise cancellation I’m the future? (Also I didn’t know if the headphones connected to another device while I was gone.
Thank you for your post and welcome to the Bose Community.
I do not believe that your QC35 II's will have been negatively affected by this scenario. Of course, you will experience a battery drain, but no different to if you were wearing the headphones for noise-canceling purposes for this period of time. If you do encounter any problems, then please do reach out to us and we'd be happy to assist you further. Global Contact Us > Select your country > Scroll to the bottom of the page > Click 'Contact Us'.