I have an iPhone 4s, I've had it for a bit less than a year now. I have the newest update, iOS 8.1. I always leave my brightness on or near the lowest setting. My problem is when I go to my high school I come in with a 100% battery life, and I leave with a 10% to dead phone. My school is only 6 hours. Some rooms have wifi so I use that as much as I can. Obviously it's school so I don't use my phone a lot, study hall included I probably only use it 45 minutes at the most in school. Why does it die so damn fast and how can I fix this?
Read more: HORRIBLE battery life on iPhone 4s?