 In the same way, even though you've got it plugged into a charger, because according to your battery management system, it's taking a look at all the battery cells in there, and it's juggling it accordingly, quietly, seamlessly, and daily, all the time. The other thing is state of health. It wants to know what's the temperature. It wants to know is there any degradation going on. It wants to know it's called lithium plating.