My iPhone 4 has been posting pretty impressive battery reports (8 hours-10 hours). However today I went jogging at 8 for a 40 minute run while listening to a podcast at 53 percent battery, and since then it's 1 it's at 20%. Now I wouldn't have a problem with that but since 8:45, the only thing I've done is answer about 20 texts. I checked my battery at 12:51 to record the rate it's going, and it dropped from 23% to 20% in 24 minutes, just in standby. What's going on here guys?