text:  Some restrictions apply. For complete details, please visit OptimaTaxRelief.com. If you're suffering in the heat, imagine how your phone feels. This summer's extreme heat not only can be harmful to our bodies, but also to cell phones and tablets. The most common ailment, diminished battery life. That's going to start with your phone slowing down, shutting itself off. Repeated exposure to that kind of heat is going to decrease the life of the battery in the phone as a whole. Electronics Business Consultant Alex Hossfeld.