The type of energy produced by batteries is electrical energy. Batteries convert stored chemical energy into electrical energy through electrochemical reactions. When a battery is connected to a circuit, chemical reactions occur within the cells, causing electrons to flow from the negative terminal to the positive terminal. This flow of electrons generates electrical energy that can power various devices, from small electronics like remote controls to larger applications such as electric vehicles. The efficiency and capacity of a battery are determined by its chemistry, design, and size, influencing how long it can supply power before needing to be recharged or replaced.