Define "ambient". Here in semi-arid California, they might work just fine. OTOH I once spent two weeks in Borneo.... my Palm Pilot (yes, it was a long time ag

Define "ambient". Here in semi-arid California, they might work just fine. OTOH I once spent two weeks in Borneo.... my Palm Pilot (yes, it was a long time ago....) crapped out within 24 hours. Electronics really suffered there. (A friend and I repaired a ham radio amplifier for a local ham. We found the problem.... in the form of a skeleton of a gecko that had gotten itself across the filter caps of the 1200V @ 900mA power supply.... not directly a moisture problem, just a general jungle problem.)