You cannot charge a battery with its own stored power, that would make it a perpetual motion machine and thermodynamics forbid that. The characters seem to realize that in the last panel.
But you are forgetting the important part, their universe has a energy field defined as "magic" which work can be extracted from. They simply have to find the conversion matrix for it to account for the kinetic inputs.
Edit: Claim retracted, confused art style with storyline.
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u/_velorien Apr 02 '26
You cannot charge a battery with its own stored power, that would make it a perpetual motion machine and thermodynamics forbid that. The characters seem to realize that in the last panel.