I am developing an iOS app, In which I need to calculate the estimated time required for charging the battery. I need to display like "Estimated time to get completely charged in 1:30 minutes".
I googled on this, but they all are displaying only current battery charging level.
This seems like it is different for every phone, so one solution could be to start it at some constant rate. So basically every time a phone shows 40% you say that is 2 hours and just decrease it proportionally as it grows. One cool thing you could do would be to log battery and time/date stamps during charge and take an average of those rates to get a more accurate time till fully charged.
Example is when the app is running, log battery and time, every 5 minutes. Save this data and formulate the avg
