The battery life on Apple's new 3G iPhone isn't great, but it beats that of other 3G smart phones The battery life on Apple's new 3G iPhone isn't great, but it beats that of other 3G smart phones we've seen. PC World's Test Center ran it through our standard talk-time battery life test, and found that on average it ran 5 hours, 38 minutes, a running time that we consider earns a Fair rating.