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How do I replace the battery in my Mastercool R11 digital gauge?

1Answers
DiRowan
12/17/2025, 07:23:15 AM

If your Mastercool R11 digital gauge is displaying battery-related issues, a battery replacement might be needed. Here's how to change the battery, based on the user manual instructions:

  1. Begin by removing the protective rubber boot that encases the gauge.
  2. Locate the two screws on the rear case of the gauge and unscrew them to remove the back cover.
  3. Carefully remove the old battery from its compartment using a flat screwdriver. Pay attention to the battery's orientation during removal, following the direction shown in the manual.
  4. Insert a new CR2450 battery into the compartment. Make sure the flat side of the battery faces outwards.
  5. Finally, reassemble the gauge by replacing the rear cover and securely tightening the screws. Then, put the rubber boot back on.

By following these steps, you should be able to successfully change the battery in your Mastercool R11 digital gauge. Using a CR2450 battery will ensure optimal performance.

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