The Gadget Guy: the latest in battery technology

A very long time ago an Italian physician called Luigi Galvani decided to conduct a

somewhat bizarre experiment. For reasons best known to himself, he hung a dead frog on a

brass hook and touched it with an iron scalpel to demonstrate what he called

“animal electricity”, illustrated by the twitching of the frog’s leg.

Strange antics no doubt, but 20 years later, in the early 1800s, a Mr Volta, convinced

it was ...