I suspect that you're waiting too long.
Once the lights scroll, a percentage light should light up right away as soon as the scrolling stops.
Within about 2 seconds, the cell will go back to regular mode unless you press and release the More button before the cell goes back to normal mode.
Once the lights scroll, a percentage light should light up right away as soon as the scrolling stops.
Within about 2 seconds, the cell will go back to regular mode unless you press and release the More button before the cell goes back to normal mode.