- Jul 19, 2014
Other than the portability issue, why hasn't bird, or anyone for that matter come up with a power supply solution (walwart type) for the bird 43 pep kit? Constantly changing 9v batteries and the possible accuracy issues (if any) due to dying 9v batteries is a drag. I have not checked if the two 9v batteries are in series or parallel but either way it shouldn't be hard to find a 9vdc or 18vdc walwart to power the meter. Maybe it would introduce noise into the circuit thus giving false readings? All other pep meters on the market use an external power supply, why not bird? Thoughts?