He experimented extensively with metals and electrolyte solutions to perfect his version of a rechargeable battery. Edison’s invention, the nickel-iron alkaline electrical storage battery, implemented ...

The first authentic account of the new Edison storage battery was ... Charging pulls the oxygen away from the iron and delivers it temporarily to the nickel. The condition is then stable, until ...

But Edison’s car used a nickel-iron battery that had been around since 1899, the work of Swede Ernst Waldemar Jungner, who also invented the NiCad battery. Edison had a deal in place to produce ...

Additionally, lead-acid batteries won preference to Edison's larger, more expensive iron-nickel alkaline packs, and still serve under car hoods today, all according to reports from the BBC and ...