BrightnessPlug is a tweak released this evening in Cydia, and with its help we can choose what will be the brightness of our iDevice's screen when you connect it to a power source. More precisely, we can choose that the brightness of the screen of our iDevice is automatically set to a high/low value when our iDevice is charging, regardless of the current source. iOS does not offer such an option, keeping the brightness at the normal value even if the iDevice is charging or not.
BrightnessPlug is available for free in Cydia.
