Fitbit Flex - Manual (Page 19)

15
Sleep mode
When you tap your Flex rapidly for one or two seconds to enter sleep mode, it will
vibrate and display two slowly dimming lights. During sleep mode, two blinking lights
alternate. After you tap your Flex rapidly to exit sleep mode, it will vibrate and flash
all five lights three times and then display a spinning light pattern.
Charging
While your Flex is charging, an indicator light will pulse to show the battery level
every few seconds. Each indicator light represents progress towards the total
charge. When the Flex has charged completely, all 5 indicator lights will blink.
Updating
If an update fails to complete, your Flex's LED indicator lights may cycle back and
forth repeatedly, from left to right, and your Flex no may longer respond to taps,
charging, or resets.
Alarms
When a silent alarm goes off, the Flex vibrates and the center light flashes.
Battery life and power
Battery life
Your Flex comes equipped with a rechargeable lithium-polymer battery.
With normal use, your Flex should last about five days before needing a charge. You
can check the level of your battery by logging in to Fitbit.com and clicking on the
gear icon on the top-right corner of the page.