Increase your iPhone 3G battery life upto 36hrs !

I'll skip the obligatory mini-biography of Guy and cut to the chase: the dude gets a whopping 36 hours of standby time with his iPhone 3G. True, many other phones get better battery life and can go for days without a charge. But anyone banging their iPhone on the wall, wishing the darn thing didn't suck down the juice like a preschooler in the Sahara will appreciate his detailed account of the settings used to eke out lengthy iPhone standby time. Oh, and those other phones? As Guy says, "...it's better to have a cool phone that you have to charge everyday than a sucky phone that you can charge once a week." How do you keep your iPhone alive? Source...