E-Jerry Can modular batteries
We've already established that weight isn't really an issue so let's just give it two battery racks. It runs off one battery at a time so the other one can be disconnected and changed. When the one in use runs low, throw the breaker over and either change the dead battery or keep running on the aux until that one dies too if you're in an emergency situation.
Larger vehicles with higher power requirements can scale up the number of battery racks they have and still use the universal Grunt Power Brick just in larger quantities, and you can create a battery hauler with a generator and like 40 battery slots to carry around your fresh ones and recharge your empties. That generator might be the one thing in your squadron that still runs on gasoline, supplemented with solar.
The plan works perfectly. You are not in charge of the hive mind.