IPhone not user-replaceable. The iPhone can be charged when connected to a computer for syncing across the included USB to dock connector cable, similar to charging an iPod. Alternatively, a USB to AC adapter (or "wall charger", also included) can be connected to the cable to charge directly from an AC outlet. Some models of the iPhone support wireless charging. Apple runs tests on preproduction units to determine battery life. Apple's website says that the battery life "is designed to retain up to 80% of its original capacity after 400 full charge and discharge cycles", which is comparable to iPod batteries.
Find My iPhone Find My iPhone allows users to locate their iOS devices using either the iOS app or icloud.com on a computer. In addition to locating a device, the service provides three key features: The update with iOS 6 added the ability to check the device's battery level. Since the release of iOS 7 users have complained about the link between GPS, WiFi, and the App itself. Some handset owners have noted the App enables and disables itself when passing between cellular protocol bandwidths. , the service is supported on iPhone, iPad, iPod Touch, and Mac computers running OS X 10.7.5 "Lion"