Cell phones and extreme cold do not mix, but have you thought of winterizing your cell phone? You battery can drop by as much as 20-percent in cold weather, that’s why you need a case that protects against that. Geek Squad Agent Derek Meister gives that advice, plus fully charging the phone before going into the winter weather. You may even want to invest in an insulated phone pouch. One creative way to protect your phone from the cold is by using wireless headsets. While they do the work, your phone is nice and warmly tucked away.