Possible fix for lousy standby battery life?

[dcinoz]

I've been using Mobian for several months now on a daily basis.
It had been doing well with mobile (cellular) modem on standby during the day. Typically down to 50 or 60% at the end of the day.
I've even had about 15 to 20% battery drain overnight with modem OFF (and wifi and BT OFF).

However, something must have changed in the last few days as it's gone 'dead' with low battery signal overnight so I can't see the time in the morning. That's always with modem OFF overnight (and wifi and BT off).

I've also had a few longer phone calls during the day and that has drained the battery very quickly (not sure if that was always the case).

I've just done a 'sudo apt dist-upgrade' to see if that helps but it definitely seems like a bad change has been made somewhere very recently (last few days).

Hopefully Mobian / other distros are aware of this too and the damage will be undone. Unless for some reason my battery is dying all of a sudden and it's just my Pinephone!