Battery model of universal TV remote controller: two AAA batteries. AAA battery is the American dry battery standard, and the No.7 battery in Chinese mainland or No.4 battery in Taiwan Province Province is compatible with it. The battery is cylindrical, with a height of 43.6 mm and a diameter of10.1mm.
Battery: It is an energy conversion and storage device. It converts chemical energy or physical energy into electrical energy through reaction. Battery is a kind of chemical energy. It consists of two electrochemically active electrodes with different compositions.