Charging fluctuates and screen dims in sync with fluxuation

After installing a Mac OS Sierra Update In noticed that my 2011 15 MacBook Pro began to dim and brighten at Random. Then I noticed that the batter charging indication in the menu bar would go from solid to outlined in sync with the screen dimming.

When awake the Battery takes forever to charge but when asleep it charges just fine.

So I am currently charging the laptop full, then unplugging it and the dimming brightening flickering goes away.

Please Advise,

Jose