Looks like the replacement battery from eBay does not already have the ribbon cable attached. Therefore some soldering is required. https://ebay.us/m/shmLZc

Did you replacement battery have the ribbon cable attached?

After completing the battery change, my headphones still connects to my Pixel 7 phone ok. But the headphones are no longer properly registered in the Sony Headphones app. Any ideas on what to do? I've tried unpairing / removing from Headphones.

I held the headphone with my hand. I figured that would keep me conscious of the heat I was exposing the headphone to and avoid melting the shell.

I suggest adding the reassembly steps rather than saying "follow these instructions in reverse order from step 8". For example, the spunger is used to remove the ZIF cable in Step 7, but this tool only works for removal. To reinsert the connector I had no success with that tool. I used pointy ended iFixit tweezers for this step. Although there might be a risk of short-circuit, they were the only tool I could think of that could grab and insert in the way I needed.

The E-8000 glue instructions advised leaving the glue to cure for 2-10 minutes - this and some pictures would be nice to elaborate on.

Separating the shell was quite challenging. The first time it was fine, the second time I found it much harder. Do you heat all along the join - or only on one side? Any tips on inserting the insertion tool?

Great guide. Thank you

I'm looking at a Sony WM-FX195 and the arrangement appears to be totally different. There's a wheel on the left (the same) but on the right there's only the motor. The right hand wheel is not present and the belt is very loose.

oops, these are removed in Step 11

the two screws pictured here, between the top set of connectors and the bottom set of connectors appears in place here. But in the following step the screws are removed. Why were the screws removed? Was this to replace the gimbal circuit board?

I made a mistake - be careful that you remove the connectors closest to the front side of the drone which have a compound seal over the connector. The compound can be scratched away. I mistakenly thought it was the pair closer to the rear that has no compound covering them.

these plastic coverings were not present on my Mavic Pro. It’s a refurbished model so maybe it previously had a gimbal/camera replacement