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Can Batt-O-Meter test 18V circuits? Or any circuit larger than 9V?

The maximum voltage the Batt-O-Meter is able to read is 10.23V. Anything larger than that will not test properly.

This means any devices that use two 9V batteries to create an 18V circuit will not work with the Batt-O-Meter. You will need to remove the batteries and test them one by one.

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