You have probably noticed that while charging your iOS device, a "live battery" appears on the lock screen on a black background, which shows the current charge level. For some reason, Apple only allows the indicator to be viewed against a black background, regardless of the wallpaper you set.
The new ChargingBackground jailbreak tweak is able to change the background under the battery level indicator while charging from a power source. It would be more correct to say that the tweak will add support for the charging mode for the wallpaper you have set.
The developers decided to distribute the ChargingBackground tweak absolutely free. The tweak is available from the BigBoss repository on Cydia.
We remind you that in order to install ChargingBackground and other popular tweaks, you need to have a jailbreak device. You can read about how to quickly and safely get an untethered jailbreak of iOS 5.1.1 in a special section of our website Jailbreak instructions.