Intelligent charge/discharge tester integrates charge, discharge single cell battery test, on-line monitor and activation functions in one machine .It can find disabled batteries quickly and display the remaining capacity of each single cell battery with capacity test to battery, increase capacity and decrease internal resistance of each battery quickly with activation. It can solve the disproportion phenomenon of single cell battery voltage efficiently. Test data can be displayed by big LCD. It can be controlled by SCM. Voltage, current, time and capacity parameter of single cell or whole group battery can be tested and set. After charging/discharging, test data can be direct uploaded to PC or transferred to U disk with RS232 interface. Battery remain capacity can be analyzed and displayed by data processing software. All kinds of chart can be printed.It can provide scientific basis for analysis of battery capability.