Anybody have a solution for this? I have an iPhone 4s and also an Ipod that I use to play my music when I skate. Both die from being on the cold boards while skating. They can start with 100% charge and after an hour, will go down to virtually nothing, and often die. When I plug them back in, they are back up to 60% charge....so it's just from the cold. I don't want to keep them on my body and I tried laying my phone on a hand warmer they other, day which did not work...anybody have a solution?