To ensure safe operation and normal use of the digital Rockwell Hardness Tester, follow these steps to remove the battery:
First, turn off the Tester and disconnect it from the power supply.
Locate the battery cover on the back or side of the unit. Use a small screwdriver to loosen the fixing screw and open the cover gently. According to the polarity marks inside, take out the old battery slowly with a non-metallic tool to avoid short circuit. Do not touch the metal contacts directly.