Why my laptop screen goes darker when electricity turns off?

Q: Just from yesterday i m noticing it becomes darker when current turns off. Did i change any settings or my battery grew already old?

A: hi there, This is a normal feature usually to improve battery life when you are not connected to the mains power. You can usually adjust the brightness back up again by pressing a couple of keys (which ones depends on laptop) and if you do not like the brightness going down when on battery this can usually be changed in the laptop BIOS. The BIOS is usually accessed by pressing a key (usually one of the F keys, F2, F10, etc - again varies on laptop), when you start your laptop you will see a "splash" screen with text saying press XX to enter setup. This is where you can change the default usually. Hope this helps.

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