WF-1000XM4 Low left earbud battery?

[AdyKing]

I've been having problems with my wf-1000xm4's.   The left ear bud battery runs down considerably faster than the right. 
I'm aware one does more work than the other but from a full charge I'm getting maybe 2 hours before the low battery warning, left bud 20%, right bud 84%.

I've cleaned all the connections although it's charging ok, just running out fast.  Anyone know of a fix?

[lenny0131]

Similar issue, however, with the right WF-1000XM4 being completely dead. The left may have up to 100%. Buds are no longer pairing with my phone. Unable to connect with the app, or Bluetooth. Very frustrating..! 

[Lunaman]

It's frustrating that Sony repaired/replaced this product due to this issue in the USA and other regions but in the UK they would not fix the issue! Having now seen various youtube vids to replace the battery I'm in the process of replacing the batteries. Bought a 'battery and kit' from Amazon https://www.amazon.co.uk/dp/B0D2LPLSYD?ref=ppx_yo2ov_dt_b_fed_asin_title and used this vid and others to work out how to repair - https://youtu.be/Xr7hzdMRjHk .

It was a bit fiddly but I got there in the end. They are currently charging. I hoping this will fix the issue. 

If not I'll come back and update this!