Typically express charge only speeds up the beginning of the charge (so the overall charge time might be close to a standard charge time). If that makes sense. Another forum post came up with this issue and it was apparently solved by 'waiting it out'. So see if this issue still persists and how long it persists.
The battery was charging from 7% to 36% just fine on ExpressCharge, when it reached 37% it stopped charging and the Bad Battery indicator turned on (4 amber 1 white). Battery Health states 100% and it starts charging again after I change the Dell Power Setting charge setting to something other than ExpressCharge. The laptop doesn't turn off even if I unplug the charger, I honestly think this is a software issue rather than a hardware issue, but I can't say for sure. I really hope this can be fixed, I really love how fast ExpressCharge charges the battery...
4 Amber 1 White only on ExpressCharge setting