Matters needing attention:
1. Main charging port
When the instrument is out of power, it can only be charged with a 5 volt power supply, and there is a charger in the box; it cannot be charged with other voltages, which will damage the power supply and the instrument cannot be used normally, such as battery voltage.
2. Secondary charging port
When the device is connected to the vehicle, it will be charged, provided by the vehicle, It can be 12V or 24V. The charging capacity is very small. It is the secondary charging port and can only be used during the test.