So I've had my T-Mobile Samsung Galaxy S 4G for like a year and a half now, and the battery life has never been great, but recently it took a turn for the worst. About a week ago my battery would only last 6 hours max if I was hardly using it. I though it was from a game I downloaded on the Market so I uninstalled it and I think the battery lasted like 7-8 hours after that, but a few days later my phone shut off at like 70% battery and when I turned it back on I had 15% or less battery. Every days since then it's been doing it. And when I go to charge it, it takes like 20 minutes to charge back up when it used to take a couple hours. Other than the app and the universal charger I bought a couple weeks before, I don't know what the hell is up. God Bless T-Mobile.