Its true that beta version have longer battery life.
Incide the battery left some blank charging space to expand the battery in heating condition.
show the result
optimise the battery ,never set in deep clean ,set normal clean.never download any battery saver ,turn of location services especially phone...
charge upto 95% Not 100%
No frequent charging ,it may reduce battery life cycle.
No drain upto 0%, it's latest Android,not Symbian phone...
No bug, no hanging , battery drain issue.....
beta update is always 45 days ahead of normal update.
do wipe catch patition and clear catch every app one by one.
kill background battery consumption all apps.
No battery drain at all after oxygen os beta 8 update.
Address the battery drain issues of OnePlus 6t after open beta 3 update.