I did something that turned off my LED battery indicator and now I can't figure out how to undo it.

I've had my 700 P for about a year and the LED was always green when the battery was completely charged and red otherwise. Last week I changed some setting and now the LED doesn't go on at all. I've searched all the settings I could find and couldn't find where I disabled the LED, but I distinctly remember doing it.

Can anyone tell me how to activate it again?