My phone battery only lasts a day. In the years before smartphones, multi-day battery life was taken for granted. Tellingly I barely use my phone as a phone. I

My phone battery only lasts a day. In the years before smartphones, multi-day battery life was taken for granted. Tellingly I barely use my phone as a phone. I suspect we will see a similar pattern develop with smartwatches, where telling the time will be only a single bullet point far down a much longer list of features.