In electronics, a battery is a combination of two or more electrochemical cells which store chemical energy which can be converted into electrical energy. Since its invention in 1800 by Alessandro Volta, the battery has become a common power source for many household and industrial applications, becoming a multibillion-dollar industry.

Nanjing ETAI Trading Co., Ltd. is specialized in design and production of professional video battery, DV camcorder Battery, battery chargers , broadcast battery, digital camcorder batteries, video camcorder batteries, mount equipment, studio light, camera light and other related accessories.