I bought my iPhone last February. During what remained of that Winter, I would take it with me when cross-country skiing, walking outside, or taking the bus to work. It seemed to operate just fine, as had my prior phone which was a Samsung. This Winter, however, the cold weather seems to be seriously affecting the phone's battery life. The battery drains quickly when I'm outside and sometimes suddenly goes from 20% or more to dead. Today, I went out skiing with the phone. I was listening to a podcast and using an exercise app to track my speed and distance. When I started out the phone had 55%, but it died after only 10 minutes. The temperature was -10F/-23C. I've also had it drain quickly after waiting to catch the bus. Is there anything I can do to solve this problem and continue to use the phone in the Winter? Is this something the folks at the Genius bar can help with? Should I create some sort of insulated pouch for the phone? I realize that temperature can affect batteries, but I'm surprised because I didn't have this problem other winters. I know I've taken phones out in colder weather than today without such a sudden failure.
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