Method to monitor home electricity supply interruptions
Battery history: https://play.google.com/store/apps/details?id=com.psw.batteryToast&amp;hl=en
This app may help, you can access the ‘unplugged/plugged log’ through the ‘charging’ button, which is on the top left of the app interface. It should be able to tell you when its ‘unplugged’ when it stops charging.
It’s ad and purchase free, but the downside is that the interface seems to be quite confusing and messy.
The below image is one of the app’s image preview on the play store.