Remove the rear cover with a screwdriver and fix it with screws. Tear off the trademark, there is a screw at the back. After unscrewing, you can fasten the back cover. Then the battery can be inserted horizontally, so that the protruding end of the battery is in contact with the sheet, and the recessed part is connected with the spring. The method comprises the following steps:

1. Find and remove the rear cover fixing screw;

2. Remove the back cover with a screwdriver or nail;

3. Take out the battery;

4. Replace the multimeter battery with a new one;

5. Replace the back cover, lock the screws and complete all the work.