Professional Reference articles are written by UK doctors and are based on research evidence, UK and European Guidelines. They are designed for health professionals to use. You may find the Baker's Cyst article more useful, or one of our other health articles.
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.
Reserve Strap At $249.99, Reserve Strap is the only band that charges the Apple Watch while you wear it. It's a silicon band that slides under the watch face, so that you don't even have to take the watch off when it's out of battery.