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
Polar Bear (battery-electric locomotive) Polar Bear (battery-electric locomotive) Polar Bear was a gauge battery-electric locomotive built by Wingrove & Rogers in 1921 as works no. 314 for the Groudle Glen Railway on the Isle of Man. Together with its sister, "Sea Lion", they were intended to replace two Bagnall steam locos of the same names. The locos were not a success and, despite "Polar Bear" being rebuilt with bogies and a battery truck, the steam locos were reboilered and returned to traffic. "Polar Bear" was eventually scrapped acround 1926. A replica loco was built by Alan Keef in 2003 for the rebuilt Groudle Glen