Test a single battery 1. Insert the clip on the front of the device and connect the clip to the positive and negative terminals of the battery. （Unplug the blue serial port and USB computer port on the back of the device） 2. press page 3. Switch to the "setting" interface， multi-ch change to "off" , trig src press F4 to "AUT" 4. press " page " to MEASURE, Can see the value of a single battery Testing multiple batteries（2-24） 1. Unplug the interface on the front of the device 2. Connect the blue serial port and the computer USB port on the back of the device. （The computer needs to install the USB serial port driver of the USB flash drive.） Clips are clamped to the positive and negative terminals of the battery 3. Press page switch to the "setting" interface， "AUT" multi-ch change to "on" , trig src press F4 to 4.press page to “MULTI” interface，All test battery parameters can be seen on both the device and the computer screen. computer screen After the continuous test, you only need to replace the battery, and press the refresh button on the computer screen.