How Long Does?

How long does the battery of Apple’s iPhone last? And how long does the battery life of the iPhone 2G compared to the new iPhone 3G last?
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: [...]