I'm not sure many small electronic devices are meant to work well in conditions well below freezing.
I hunted in low 20deg temps and noticed mine did not range one time when I purposely left it out for over an hour. Typically mine is left in my shirt pocket with enough insulation/body heat to keep it from freezing and have never had an issue down to temps as low as 0 deg F.
I must say, my 1600b has worked very well in my opinion for the 3 years I have had it. The ballistic calculator is useless, and the temp reading is also, again because it's always reading my body temp, but the range, angle, and baro pressure is great and quick in a very conveniently sized package.
I use my cell phone SHOOTER app to calc drops if shooting over 400yds, use my handy handy Kestrel for near instant wind and temp readings, and the RF gives me a very accurate and quick range, shoot angle, and baro pressure. Quick shots are kept to 500 yards or under when my drop lines work fine.
My biggest issue is keeping my phone battery from discharging too fast, but I carry a small backup portable charger that helps.