We detect such currents in muscles, nerves, secretory glands, and electric organs of fish as well as in plant tissue -LRB-...) It seems likely that all these currents have a similar, if not the same basis, and that their strength and potency depends on the structural conditions and chemical composition of the cells making up each organ.» (bccn-berlin.de)
But he thinks that tweaking the hydrogel setup to more closely imitate a real eel electric organ — like by printing thinner gels — could give these energy sources more oomph. (sciencenews.org)
Electric Eel - Inspired Device Reaches 110 Volts: This photo depicts the printed, high voltage implementation of the artificial electric organ. (sciencedaily.com)