Calibration - measured vs total mAh
Battery Monitor Widget produces 2 mAh values representing the total capacity of the battery.
The calculated mAh is derived from the specifications/reference data entered manually (original mAh, mV range) and compared to actual mV range from history file.
It is best to run a charge/discharge cycle to produce the initial reference data and compare the change over time.
The measured mAh is the average sum of all charge/discharge measured by the app during the past charge/discharge cycles. This should show a realistic value of actual battery capacity.
It will get more accurate if the app is monitoring while the charge/discharge cycles are being produced.
1- Run a charge/discharge cycle (between <5% and 100%)
2- Update the reference data with measured mV range and mAh specification from manufacturer
3- Run more charge/discharge cycle
4- Check total mAh evolution and adjust reference data
5- Use phone as you please.
6- Run a charge/discharge cycle
7- Check calculated mAh evolution which should reflect battery aging
8- Compare with measured mAh and adjust reference data and stored data
9- back to 5
1- This screen is still experimental and produces data to get a view on battery quality and aging
2- To get more precise measured results, the charge or dischage cycles must be continuous with the app logging all measures. Charging the phone while completely off will prevent accurate calcuations.
3- Total mAh (calculated) will be more accurate when specifications/reference data are accurate. This total mAh can be used to measure the actual battery aging and the reduced capacity over time.