> 
> But if the capacitor is charged then it *has* a voltage! And current
> will flow until that charge has been exhausted. There's nothing
> mysterious about that. But claiming such a system has "no voltage" and
> yet there's current flowing through it is just silly.

What about solar wind? The sun emits charged particles (of really high 
energy). That's a stream of charges, meaning a current. Unless they 
dissipate their energy by scattering events, they will move on forever in 
the (mostly) empty universe (unless they reach the end of the universe, 
may it be spatial or temporal, whereby in the latter case the can visit 
Milliway's) or the wrap around when the space/time position overflows...

You could argue that the sun emits isotropically in all directions, 
meaning no net current, but where's the difference to a closed electical 
circuit (battery, cables, lamp i.e.), from outside the circuit, all 
current vectors at all positions sum to zero too...

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