So I've been on a number of cold weather outings with iPhone users who always end up with VERY POOR battery life in the cold. Most go dead in a few hours. Multi-day hunts to simple scout overnighters, if it gets too cold, they all seem perform the same. What was a fully charged battery goes dead in a few hours.

I have an Android based phone that I can use for days on a cold weather hunt without charging. Both types of phones can turn off GPS, Bluetooth, wireless, data, etc to save battery life.

So it makes me wonder, is it the iPhone (multiple generations) or their choice of battery which has such poor performance?