Was able to replace the battery in my Bose headphones. Followed a video on Youtube. Works perfectly.

Fast charge, but fast discharge as well.

Received the battery very quickly and everything i needed was included in the package. Headphones now work like they use to.

Was not that hard to solder and place battery in but indicator lights still not functioning right and it’s sad bc I think the cQ 35 2 has a great sound and better than previous and later models.
I wish I could find a reputable repair shop to work it out but they’re hard to find. It was worth the gamble however since I get about 12 hours of use instead of 20. Bottom line; I used really basic soldering and heat gun are it wasn’t that hard to swap out old battery.