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
Battery electric multiple unit and Pukekohe. From Britomart the trains will operate on electric overhead wires to Papakura. From Papakura the trains will switch to battery mode for the journey to Pukekohe. Operation is to start in 2019. Battery electric railcars used by British Rail included the British Rail BEMU and British Rail Class 419. The Class 419, operational from 1959 to 2004 could run either on batteries or a third rail being used for short unelectrified section on quaysides. In 2015 a single Class 379 Electrostar, after electric lithium batteries were installed, began passenger operations on the Mayflower Line in Essex. The train