anyone know how to change battery on the qc35?

Can't believe managed this, what a sense of achievement, never thought mine would work properly. I used a suction cup but screen shot up and yanked the home button connector out. Fortunately not broken. Also, there was no connector cover.

Tips: I used a long fridge magnet and put screws in order of iFixit guide. Then replaced in reverse order. The fourth (non Magnetic) screw on the plate didn't seem to go back properly - I think the socket might have come out with the screw. Didn't seem to matter. The connectors are super fiddly but snap back in place. Helps to work out the positioning of components on underside so you know where to position when looking from top. I put everything on a big box on my desk to raise it to eye height (I'm v short sighted) that helped immensely. The digitiser connector cable (3rd removed near top) has a plastic ridge running down middle, and that fits into a slot in the socket - all 3 of those cable connectors snap shut. Dental floss, 2 cards and radiator heat for glue!

Pro tip: Use 2 cards together - slip one over the other. Start the process with dental floss…

I put on the radiator then used dental floss to start and then two iFixit cards together to pry from home button and outside edges. Didn't notice but I bent the little home button connector guard (not the cover - I didn't have one) but it seemed to make no difference, just bent it back.

there is no way these strips can be stretched (3y o phone) snapped immediately, plus 1st tore on non existent cover imediately

Mine also doesn't seem to have a bracket. Plus the cable unclipped itself when the screen shot free - yikes. Looks OK though. I guess I'll find out soon enough.