Sony WH-1000XM3 Battery Troubleshooting, Repair or Replacement Walkthrough - Teardown and Fix

A walkthrough showing how to troubleshoot various battery issues (charging light blinking, battery not charging, charge not lasting as long as usual...) and how to replace the battery if needed.

APRIL 2022 UPDATE: If you need a battery troubleshooting and repair video for the 1000XM4s, I FINALLY posted that video. Check it out at this link:    • SONY WH1000XM4 Battery Troubleshootin...  

Please comment below with any questions or feedback! I have lots of replacement parts for these headphones on my eBay store. Please use the following link if you need some parts :) https://www.ebay.com/itm/194819910342
If I'm currently out of batteries, please check out this Amazon listing for a high quality replacement battery: https://amzn.to/3w6moym

In the worst case scenario that your headphones are damaged beyond repair (R.I.P.) I'd highly recommend upgrading to the WH-1000XM4 model. The price different between the XM4 and XM3s is much smaller than I'd expect and usually Amazon is running some sort of fantastic deal :)
Check out the listing here: https://amzn.to/3ikSlLv

Also, I'm including links to the soldering station and precision screwdriver set I used in this repair that I've had for YEARS and use to fix everything. Check them out on Amazon here:
Soldering Station: https://amzn.to/3i18eWX
Precision Screwdriver Set: https://amzn.to/3q0BlOI

Thanks and best wishes!