With electric motor as power, battery as energy. The loading capacity is 1.0~8.0 tons, and the working channel width is generally 3.5~5.0 meters. Because there is no pollution and little noise, it is widely used in indoor operation and other environmental conditions, such as medicine, food and other industries. As people attach importance to environmental protection, electric forklifts are gradually replacing internal combustion forklifts. Since each battery generally needs to be charged after working for about 8 hours, it is necessary to equip spare batteries for multi-shift working conditions.