This is iPhone 3GS Battery Replacement for iphone 3Gs mobile repairing. This iPhone 3GS Battery Replacement will only fit the 3GS version of the iPhone, please see our other spare parts for 3GS Original iPhone Spare Parts. The battery inside the iPhone is soldered to the units communication board, maybe making it difficult for the end user to easily replace. If your iPhone battery is just not lasting as long as it used to, taking forever to reach a full charge, or maybe the iPhone has been left uncharged for a long period of time and no matter how much you charge the battery it still has poor performance. If this is the case you need a new Apple iPhone 3GS battery replacement.