Do you guys have any issues with your phone while skiing? I swear mine runs out after 4 hours even if it's just sitting in my pocket turned off. (Samsung Galaxy nexus). I'm not sure if my phone in particular has issues with the cold. I turn off most everything (GPS, wifi, bluetooth) screen is off in my pocket, but it still just drains.
I tried an external battery and that helped but it's still not 100%. Problem is it's nice to check in with people particularly if you have friends on the slopes. I texted a lot during the summit to coordinate meetups / etc.