The "minimum" temperature is going to be for the display and for the batteries. Everything else is probably more worried about the "maximum" temperature.

The display probably won't get hurt at all by the cold. It's just going to get really slow and laggy. It may stop working but the computer will probably think it's still working. The main problem is going to be the batteries. Li-ion batteries do pretty well in the cold and hold their capacity better than other chemistries but you don't want to freeze them solid (freeze is a bad word, no water in there - but deep cold eventually causes the voltage to drop too low). If you do that, they can just die. Generally, unless very deep cold, Li-ion batteries won't freeze if they are being used. Prudence would dictate keeping the battery from freezing. IIRC, the freezing can cause a permanent capacity loss but the real danger is if you try and charge them when very cold with a charger that isn't smart enough to deal with it.

Really cold is REALLY COLD for most people. I've used my Garmin Edge 1000 on a front mount on my fatbike down to near 0F and ti was fine.



J.