My "Xperia Z5 Compact" (Android Ver. 7.0) has shut down frequently for around last 10 days. Even if the battery is still 30%, the phone suddenly shuts down and shows "low battery" indicator. Whenever shutting down, I immediately charge the power to the phone, then it recovers with indicating the original battery power (e.g. 30%).
I am feeling very stressful and irritated. If anyone has the same experiance and knows how to solve the issue, I woud like to know and request you to share & reply.
* I am using the phone in India. MNO is Airtel. I think the environment related to mobile is very bad in India and Airtel SIM(4G) consumes lot of battery power unneccesarily. In Japan or other country, it is not like that.