This app helps you monitor your device in real time. Check your battery consumption and see if your charger is as powerful as advertised. There are many indicators to track:
1) time to full charge
2) charging and discharging speed in watts and milliamps
3) real battery capacity
4) device temperature
5) device voltage
6) device current in mA
7) discharge rate in %/hr
8) voltage health
9) battery health
10) battery type
11) battery status
12) plug type
There is also a live (real-time) notification bar that can be toggled on or off.
Real time monitoring for device battery and charging info