Now, after one week, I can confirm that the standby battery drain on my PW3 running the beta build 2018-12-19 seems a liitle bit lower than with the current official build 2018-12-10. But it is obviously still a bit higher than in the previous official build 2018-06-09.
"Standby" means here: Running Coolreader, launched via your launcher (not via KUAL!), using your Kindlet (azw2 active document), and displaying a user defined sleep picture. The device was switched on only for a few seconds each second day, just to check the battery percentage display in the status line. Power drain is still about 1% per day - it was less than 2% in 3 days with June 2018 release though.
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