In the App Store there are numerous applications that calculate the time you can spend using various functions of your iDevice's iOS. If those applications only estimated the time of use of various iOS functions, tweak your PowerLeft calculates the period of use of your iDevice according to the energy consumed while you use it. The tweak retrieves information from the internal register that changes the battery percentage and based on the retrieved information tells you how long you can use the iDevice, but everything based on the energy consumption generated by your applications.
Did you ever get yourself trying to estimate the remaining battery time? Powerleft is a tweak that customizes your status bar, and allows you to include an estimate of the remaining battery time near the carrier name, near the clock, and especially on the side of the battery percentage. More than that, Powerleft also allows you to put the carrier name and battery percent at the same time in the place of the clock, or the date in the place of the battery percent, or any combination and format you want (you can input custom strings). Also, Powerleft can create an overlay window (which can be configured to show only when status bar is hidden) which stays discreetly in a screen corner, showing to you the remaining time, the clock, or any information you configure it to show (See screenshots).
PowerLeft also has a settings menu in the iOS Settings application, there you can change a lot of options, but also the way the information is displayed in the status bar at its base. You must remember that PowerLeft calculates the remaining usage level based on the current usage level, so the data can change at any time. PowerLeft is available for $0.99 in the BigBoss repo Cydia.
Powerleft estimates the remaining battery time based on the current battery consumption. Whenever this consumption changes, the estimate is soon refreshed. If you are using your device when it is charging, Powerleft will estimate how much time is left until your device is fully charged. This package includes a tweak, a SBSettings Toggle and a tool that shows remaining time estimation on the command line. It can be configured on Settings. Please send feedback to the mail on the Settings page, suggestions are welcome! Powerleft is notified every time the internal registry with the battery charge changes. It doesn't keep checking every X seconds for changes (ie polling), so, you shouldn't worry about Powerleft's own battery consumption.
