Bowers and Wilkins B&W PX Wireless Noise-Cancelling Headphones | eBay
Bowers & Wilkins J271/ICR18650NQ-3S Battery Replacement 2600mAh | eBay
Looks like it may be possible to replace the battery in the new PX8 for future reference. At least going off the PX design… if you are brave enough 😆 : r/headphones
Teardown, Bowers & Wilkins PX on Behance
Bowers & Wilkins launches new PX noise-canceling headphones - The Verge