I put together the homemade e-caller on Varmint Al's website last week and went out for my first coyote hunt on Sunday afternoon. Unfortunately after about 30 minutes of calling, my ipod that had all my MP3s died. It was nearly fully charged when I started but it ran out of juice really quickly. It was cold and I just had the ipod sitting beside me. Has anyone else had this type of experience? I can't imagine that it was using any extra power for some reason due to the setup, but maybe there is something that I missed. Maybe next time I need to keep it in a pocket with a hand warmer or something. I hope to go out again Friday night so I need to have something hopefully figured out by then.