The batteries are recharged during descent, if I understand correctly. Since "full power" in this craft requires the lithium batteries to be charged, I wonder how much reserve energy will be left in those during cruise for contingency reasons. Perhaps there is plenty left for fighting downdrafts, etc. Unsure.

One nice thing about electric motors is that they can be "throttled up" almost instantaneously, unlike some (not all) turbines. For example, that ultra fast response may be useful in a wind shear situation.