The method of replacing the battery is:
1, disconnect the power supply first to prevent electric shock.
2. Find the battery in the servo driver, which is usually located on the cover on the back of the motor driver. You need to unscrew the cover.
3. Take out the old battery and be careful not to damage it.
4. Insert a new battery into the battery holder, and the positive and negative directions of the battery should be correct, otherwise it will not start.
5, close the cover plate, pay attention to check whether the cover plate is fastened.
6, power-on inspection, turn on the power supply, observe whether the state of the motor driver is normal, whether the ERR20 alarm is lifted.