Hi Mathieuprov,

Wonderful! Thank you for following up. All meters are tested before they leave the factory, but for testing the meters are powered by the little gold pads on the bottom of the circuit board near the side with the LED, so if there is an issue with the battery contacts it is not detected. If I do a deep redesign/Mooshimeter V2, the batteries and contacts are the first decisions I will be reviewing.

Thank you again, let me know if anything else comes up :)
~James