Hi I have a thermometer with a remote wireless sensor, Oregan RAR621. I noticed that the lowest outside temperature recorded was never below -4 0C even although my old min/max mercury thermometer said otherwise and have discoverd why. The sensor does not send a signal at low temperatures because, I think, there is not enough power in the batteries.
So what are the best type of batteries (AAA) to use in a wireless sensor subjected to low temperatures? Thanks Ron