Battery Life of iPhone 3Gs

A cellphone's battery life varies depending on how people use their phones. Power drainers include the number and length of calls, the volume of e-mails and text messages and the amount of Internet surfing. So average battery time is difficult to determine, but few see much improvement in the latest iPhone's longevity.
The iPhone 3G can keep you browsing for a little over 3 hours before completing dying. That's with no additional phone calls or anything else going on in the background, just constant surfing. The problem is that this is a very realistic scenario for many users. If you're out of the house and stuck somewhere without a laptop, you'll want the speed of 3G but the battery life will mean that your surfing experience is almost half as long as it would be on Edge. Granted, you can load pages faster in the same amount of time, but you'd have to load pages around twice as fast on average to equal the same productivity.
So,here are the battery timings of iPhone 3Gs.
iPhone 3Gs
Talk Time - 3G 5 hours / EDGE 12 hours
Web Browsing - 3G 5 hours / WiFi 9 hours
Video Playback - 10 hours
Audio Playback - 30 hours
Standby Time - 300 hours