You could have the best smartphone in the world in your hands. If you get stuck in an emergency situation with a dead phone, you are going to out of luck. The SpareOne Emergency Mobile Phone is not only compact but has a 15 year battery life. It is made for emergency situations and transmits its location too. All you have to do is insert a new SIM card, add any AA battery, and start calling. The special battery does get you 10 hours of talk time and goes for 15 years.