How does the battery life compare to the iPhone 3G?
Apple says the battery life for the iPhone 3G S is longer than what you’d get from the iPhone 3G. Specifically, the company is promising nine hours of Internet access on Wi-Fi, 10 hours of video, 30 hours of audio playback, and 12 hours of 2G talk time. The five hours of 3G talk time on the new model is consistent with the estimated talk time of the previous iPhone 3G.