http://nypost.com/2015/03/10/heres-why-your-apple-watch-battery-wont-last-a-day/ Apple Watch battery can die after 3 hours By James Covert March 10, 2015 | 1:04pm Modal Trigger Careful with that Dick Tracy routine on your new Apple Watch — you won’t be able to keep it up all day. Apple has quietly admitted that using its new gadget as a phone — a nifty feature that CEO Tim Cook gushed about in a splashy presentation — drains the battery in as little as three hours. That’s far less than the watch’s 18-hour battery life touted by Cook as he showed off the device to reporters Monday. “I’ve been wanting to do this since I was 5 years old!” the 54-year-old exec told the crowd. “The day is finally here.” Gabbing on the phone isn’t the only thing that will send you back to the device’s magnetic clip-on charger well before 18 hours are up.