Im new to the iphone world just got my 3g on launch. For those that this question would apply: I'm wondering what to expect from the iphones battery health after a year of use? The reason I ask is because im hoping that this phone will last me 2yrs without a battery replacement. At that point I would just upgrade to the new iphone. Am I being unrealistic? Is it a better return on investment to sell it after just year and upgrade? (assuming they will have a new phone in a year) whats your thoughts?