My Phone is Android 9 Motorola.
Under Apps&notifications/Special App Access I can find a Battery optimisation,
which for a lot of Apps, says 'battery optimisation not available'
Going to try it on my phone for awhile

Peter.  Bah - all the android differences.

On 04/05/2023 10:15, Ralph Corderoy wrote:
Hi Peter,

My problem is the Android phone which I
use for Jitsi now stays permanently ‘Awake’, burning through 100%
of battery in about four hours.  The battery chart's detail has
‘Media’ as one of the top two users, but the percentage of all
those that are listed is well under 50%.  I suspect Media though
because clicking it shows it is Awake for 100% of the time and
used CPU for about 50% of it.  Perhaps that's a dual-core thing.
What app is this battery chart?
It's built in.

- Swipe down for Notifications.
- Tap battery, arrive at ‘Battery usage’ with a chart of recent
- ‘More Settings’ underneath it, arrive at ‘Battery’.
- Same chart shown but underneath is ‘Use since last full charge’ and
   then a few apps listed.
- Either tapping the chart puts extra bars underneath it showing what
   was on at different times of discharge, e.g. ‘Screen on’, and ‘Awake’.
- Or tapping one of the apps gives detail on its usage, e.g.


     CPU total            2h 36m 49s
     Keep awake           5h  9m 33s
     Computer power use   410 mAh

I'm guessing this phone is dual core given:

     $ units -1 '2 hour + 36 minute + 49 s' '5 hour + 9 minute + 33 s'
            * 0.5065956

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