How Can I Tell When My Fitbit Is Charged?

To use your tracker, swipe to the right on the screen that displays the battery. A tracker that is completely charged will display a solid battery icon. As the Flex 2 charges, each white light indicates that the battery has reached 25 percent of its full capacity. When the tracker has reached its maximum capacity, a green light will illuminate, and after that, each of the five lights will glow for a few seconds before going off.