Garmin's new Vivofit 4 tracker still uses coin cell batteries

Garmin is still making lightweight activity trackers, ones that appeal more to the step-counting crowd than the mountain-climbing kind. The company just announced its new Vivofit 4 yesterday, which sounds pretty similar to the Vivofit 3.The Vivofit 4 has a coin cell battery, like prior models, which means it should last at least a year before you have to replace the battery. It syncs with smartphones over Bluetooth and pairs with a companion iOS / Android app, called Garmin Connect. It also auto