Battery Magic Pro is an application for iPhone which provides detailed information about the percentage of the battery you have available, its capacity as well as other very common information about how much and what you can do with the available percentage.
As you well know Apple Lossless Audio CODEC (ALAC), had some problems with displaying the battery percentage, and probably still has considering that 3.1.3 firmware brought a bug fix for this issue, that's why Battery Magic Pro is a very useful application for owners of iPhone. The application provides detailed information about the battery status, the available percentage, but also access to a menu that provides details about the actions that can be done with the available battery percentage and how long it would take until it ends, for example: how long would the battery last if we - we would watch a movie, listen to music, surf the Internet using the connection 3G/Wifi, etc. and all this customized according to the available battery percentage. But that's not all, the application also has options for warning when the battery percentage reaches close to 0, and something very interesting, a warning when the phone needs a complete recharge cycle.
This is not the first and certainly not the last battery application considering that Apple Lossless Audio CODEC (ALAC), it constantly improves the algorithms for calculating the remaining battery power, but it is among the best applications and I recommend it. Battery Magic Pro it is highly customizable, giving you the opportunity to change the images both from the application menu and the one displayed when the battery is charging.
Battery Magic Pro comes in 2 formulas: a Lite application that has much fewer functions than the Pro version, and can be downloaded from Ro AppStore from here, and the Pro version presented by me above, with all available options that costs €0.79 and can be purchased from the same store, here.
