Battery E.T.A. displays on the notification bar the battery level (in %) the time when the smartphone will be run out of battery or the battery time left. These values are based on phone stats usage.
A widget is available as an add-on (Battery E.T.A. widget) available on the market.
Daily chart usage shows the discharging velocity (%/h) during each day.
Now support for multiple batteries is available.
ON THE VERY FIRST DAYS, THE ESTIMATES WILL BE QUITE INACCURATE. YOU MUST WAIT FEW DAYS TO LET THE APPLICATION TO GATHER SOME STATS.
IF AFTER SOME DAYS YOU SEE THAT THE ESTIMATE IS WRONG, PLS SEND ME YOUR LOGS AND I'LL TRY TO FIGURE OUT.
See web site for more info and rel. notes