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All-day battery life is based on 18 hours with the following use: 90 time checks, 90 notifications, 45 minutes of app use, and a 30-minute workout with music playback from Apple Watch via Bluetooth, over the course of 18 hours.
The Apple Watch will start shipping in April, Apple CEO Tim Cook said during a call with investors and analysts on Tuesday. First announced in Sept. 2014, the Apple Watch will come in three different styles, the most expensive of which will be covered in 18-karat gold. The watch will connect to the iPhone, and start at $349.