Lemon battery Lemon battery A lemon battery is a simple battery often made for the purpose of education. Typically, a piece of zinc metal (such as a galvanized nail) and a piece of copper (such as a penny) are inserted into a lemon and connected by wires. Power generated by reaction of the metals is used to power a small device such as a light emitting diode (LED). The lemon battery is similar to the first electrical battery invented in 1800 by Alessandro Volta, who used brine (salt water) instead of lemon juice. The lemon battery illustrates the type of chemical reaction
NZR RM class (Edison battery-electric) looked like a passenger carriage, but each end resembled the front of a tram from that era. The body was built by Boon & Stevens, the noted tram-car builders of Christchurch, in 1926, and equipped with Edison battery-electric equipment. Capable of carrying about 70 passengers, with 60 seated, and a separate smoking compartment, the railcar had a range of about on one battery (charge). Apparently, a layover of about 4 hours was needed to recharge the battery. When introduced the railcar was billed as capable of being used on the Christchurch-Little River and Christchurch-Rangiora runs as well as being available