Just for inspiration. A quick battery idea just as a philosophical possibility.
So my idea is to capture the energy from electrons while they are flying at high speeds.
I think its possible to create such a battery with electrons in vacuum with high voltages. However vacuum might not be so ideal since it does not provide an adaptable function. So maybe the battery would use a neon tube with ?coils.
Maybe the battery today is a heavy bottle neck and you need an electron ?multiplier that does not take so much weight.
If nothing else I had fun making the rendered image.Maybe an extreme battery should have extreme properties like high electron ?speed. The big C battery.