i have a dell xps 15  XPS 15 (L501x) inch i bought last year and i notice how the battery indicator blinks yellow a few times then on white.

i checked the battery status on windows 8 and it says "plugged in not charging" at 91%?

it never goes to 100% when its plugged in but at the same time doesnt decrease the battery power.

if i let the power go down to zero. i am able to charge it only up to 91% and then the battery indicator starts blinking white and yellow.

any advice?

Thanks