Ev's make zero sense in military applications.
The only place I would think an EV would be practical would be to use one as an Urban Assault Vehicle (UAV) and ONLY because it could be quieter when approaching a hostile target.
And easy to blow up to keep it our of enemy hands
You don't think its a good idea to drive a giant lithium battery through a war zone?
Honestly, a ton of stuff is "Hybrid EV" already (not common in military at all, for obvious reasons). It just run's on diesel and powers electric motors.
That works, it's been used in locomotives for a long time