7. Snapchat
Everyone can guess what you are doing with your phone when you pull a weird gesture with your face before typing a message. There is a 90% chance that you are on Snapchat, and you want to let some folks envy you a little. If you still love your battery, you just have to turn off the geofilter and rainbow puking. Snapchat is a big battery killer because it makes use of your camera and location service at the same time.
