Bud as the network in India is getting worse, battery drain is increasing. Maybe you could try switching off location services (and only switch them on when need be). This is because when there's low network, location services take up even more battery than usual.
For battery I suggest 1- Disable auto brightness.. Because it M30s uses front camera for brightness calibration and drains battery.. In your battery graphs you will see camera light sensor 3rd or 4th.. 2-Always on Display turn to show as schedule or tap to show better way tha always on.. 3- Uninstall unwanted apps on your phone.. As it keep sleeping in memory and drains.. Recently I'm facing charging issue.. 15W charger feels really slow.. It's not a confirm statement.. I'm just checking I may be wrong..
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