I am an avid iPhone 3G user, but my chief complaint about the
device is the battery lifetime. All of the extra hardware that makes the
iPhone great (GPS, WiFi, 3G GSM, accelerometer, digital compass, etc.)
drain the non-replaceable battery within a day of charging, with
moderate use. Not surprisingly, a slew of add-on products from
manufacturers such as Dexim have hit the market to append the poor
battery performance of the iPhone. The Dexim P-Flip offers an extended
battery in the form of a foldable dock.