Today my battery drained really quickly, went from 100% to less than 15% in 4 hours. Didn't do anything, no internet, no games, made 2 calls totalling about 5 minutes. This is the first time this has happened, I usually don't put it on the charger until around 1 or 2 pm, and even then it is down to maybe 50% and that is after multiple calls, running a few apps and palying a few games. No settings were changed. Weird, anybody else have this happen?