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.
People Power Company at Bitfone, which was acquired by Hewlett-Packard. People Power was initially envisioned as a greentech company with a focus on energy efficiency. In 2013, the company released its "Presence" app, which is designed to turn older smartphones and tablets into home monitoring devices and sensors using the device's built-in camera. The Presence app also allows users to monitor and control third-party internet-connected appliances and electrical usage in their homes. The app was originally available for iPad, iPhone, and iPod Touch devices. In mid-2013, the company's Chief Scientist, John Teeter, was selected as a Presidential Innovation Fellow and worked at the