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How long does the iPhone battery last?

  How does the battery life of the iPhone 2G compare to the new iPhone 3G? iPhone 3G Talk time: Up to 5 hours on 3G, Up to 10 hours on 2G Standby time: Up to 300 hours Internet use: Up to 5 hours on 3G, Up to 6 hours on Wi-Fi Video playback: Up to 7 hours Audio playback:…