I have a Dell G7 that is about a year old. Just recently it shuts off and won't turn on if the charger is not plugged in. In Windows it shows the battery percentage at 99% but the light on the front is quick flashing orange. As soon as I unplug the charger it shuts off.
Just opened up the Dell Power Manager and there is an error saying, "You're battery no longer operates and needs to be replaced."