It doesnt matter if its thermo electric or compressor. Either can and have been adapted for use with cigars. The biggest problem with compressor type is that the high temp is often below 40degrees Fahrenheit. The lower the temp the more likely to have condensation inside. You may need an external temperature controller to get the temp in the 55-65 range.
Also, in any cooler the Rh of the air is irrelevant. It may swing 20-30% each time the unit cycles. Put your hygrometer inside one of the boxes and see where your cigars are reading.
Lastly, depending on the type of beads you are using only 2/3 should be clear or moistened. Beads sitting in water will lead to mold growth.
