Scientists are studying electric eels’ natural, bio-inspired batteries—made of stacked muscle cells—to develop environmentally friendly, flexible power sources that could be used in medical and technological devices. Advances include prototypes generating over 110 volts and miniaturized, much more powerful systems, showing great potential for integrating living tissues with electronic systems in the future.
Electric eels have been generating electric power for millions of years without relying on modern batteries or lithium technology. Instead, they use specialized muscle cells that are stacked together like coin batteries to produce high-voltage electricity, up to 860 volts. This natural ability allows them to effectively stun prey and defend themselves, functioning as living tasers.
Scientists are studying these electric eels to understand how their internal “power packs” work. By examining their bodies with tiny droplets of salty, jelly-like substances, researchers are reverse engineering the eel’s natural electricity source. These bio-inspired batteries are flexible, see-through, and free of metals or toxic liquids, making them environmentally friendly options.
The development of artificial bio-batteries that mimic eel electricity is promising for future medical and technological applications. Such batteries could be designed to be implanted inside the human body to power health monitors, bionic limbs, or even augmented reality contact lenses. Their biocompatible nature means they might be safely integrated with living tissue.
Progress has already been made in lab settings. A prototype created by teams from the University of Ann Arbor and the University of Fryborg in Switzerland generated about 110 volts. This demonstrates the potential for these biological batteries to produce significant electrical power, similar to natural eel discharges.
Further advancements have taken place at the University of Oxford, where researchers miniaturized the droplets used in these batteries by a factor of 100,000. This innovation resulted in a system that is 680 times more powerful than earlier versions. Although these bio-batteries are still in developmental stages, their potential for revolutionary energy solutions is vast and exciting, hinting at a future where living and electronic systems are seamlessly integrated.