This method works but has to be repeated at variable intervals as the phone will revert to high battery drain eventually. Sometimes a few days, sometimes a few weeks. Seems to be dependent on updates and notifications being sent to the device - especially if updates do not install automatically or some app(s) send notifications which hang around waiting to be acknowledged or cancelled (AVG seems to be a major culprit, with "PRO" notifications etc., along with existing apps which request new permissions before they will install). The cause still seems to be Google Play Services which is now too stupid to go to sleep if there are notifications like this in its cache ... and, after that, simply seems to forget HOW to go to sleep even after those notifications have been acted upon and removed from cache.

Google is to blame for this !! Making it easier for its app providers to nag users and thereby costing users valuable battery time. Google should fix this in favour of users ... but I'm not holding my breath for that to happen !! It's clear that Google has no concern for its users at all ... and moves away from being user-friendly more and more every day while pushing ahead madly with newer and newer versions of Android with dubious "benefits".

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