Based on the intelligent charging / discharging tester, it adds the charging, discharging and activation functions of 2V/6V/12V single batteries. It can not only maintain the entire battery group, but also charge, discharge and activate the outdated single batteries. It has a large LCD screen display, single-chip control, U disk data transfer, software analysis and other complete functions, and a high degree of intelligence. It is a comprehensive instrument designed according to the all-round maintenance requirements of batteries.