Wireless Bluetooth-compatible Adapter For Bose QC15 QC 15 Wireless Bluetooth-compatible For Bose QuietComfort 15 Receiver aptX - AliExpress
Amazon.com: AirMod Wireless Bluetooth Adapter for Bose QuietComfort 15 Headphones (QC15) : Electronics
[QC15] tired of using batteries : r/bose
Bose headphone repair - wire came off battery connector, unable to re-solder back down. Help appreciated with ideas on making wire longer and reconnecting! Thanks! : r/ElectronicsRepair
Battery door is missing - QuietComfort® 15 Acoustic Noise Cancelling® headphones