Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8C148) On the Apple site about the iPhone 4, it days that the iPhone battery can sustain up to 400 full charges while going down to 80% of the original capacity in the best case scenario. Older iPhone versions probably have even worse battery characteristics. So for all you heavy iPhone users, do you usually replace your iPhone battery after 1 year to maintain decent battery life? (by comparison, the iPad is stated to take 1000 full charges to go down to 80% of the original capacity. The iPhone 4 battery seems only to be good for only 1 year.) Sent from my Scientology phone.