Full post: https://dcra.in/Vivosmart4 Garmin Vivosmart 4 on Amazon: https://amzn.to/31KJ3PJ (Links above help support the site! Thanks!!) Here's everything you need to know about the new Garmin Vivosmart 4, Garmin's first watch with Body Battery, and the second with SpO2 measurement. I dive into how the new Body Battery works (or whether it even works), plus details on how Garmin is implementing SpO2 in sleep-related metrics. I cover both hands-on with the watch as well as the app, which is equally as important to the whole equation. But as I show, all isn't as good as one might hope. Perhaps it's just early days. The Site ► http://www.dcrainmaker.com/ Main Camera ► http://amzn.to/2vGjVcT The Drone ► https://amzn.to/2LrPEoc The Gimbal ► http://amzn.to/2vG9wh3 Action Cam ► http://amzn.to/2DS2TMg All Camera Gear ► http://dcra.in/DCRCamera Instagram ► https://instagram.com/dcrainmaker Facebook ► https://facebook.com/dcrainmaker Twitter ► https://twitter.com/dcrainmakerblog Strava ► https://www.strava.com/athletes/dcrainmaker Most Music ► https://player.epidemicsound.com/#/ #Vivosmart #Vivosmart4 #Garmin