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Do the batteries last for a while? Mine are the ultra basic ones, there are no ports for external probes. Mine have been sitting on the deck for a few hours, the air feels like soup and the gadgets agree.There great , and you can get a extention lead that plugs into them , that's that headphone jack, To place over the canopy , used them for years. Only problem I found I'd it slows downloading the historical data, after a few months.. When battery is low, or the could just be my device I use to take the reads off.. but really good for a quick check without opening up everything.View attachment 8888