I really need to keep my screen at full brightness when the charger is not plugged in but I have not found a way to do that. The power settings do not help, and the function keys to brighten the screen will not put the screen to max when unplugged. My work environment does not always allow me to plug in but I always need the screen to be at max brightness. If anyone has a solution to this dilemma and is willing to share it, I will be greatly appreciative.

Latitude E5510 (Bios A15)

Win 7 Pro (all updates)

Extended life battery