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There are two USB ports that appear to share a 2.1 amp rated power supply circuit. I do not know what the recommended charge rating is for the Fitbit device you are asking about, but if it is significantly less than 2.1 amps (i.e. .8 ~ 1.2 amps) I would use the converter that accompanies the Fitbit rather than this device, as you may depreciate the life cycle of the battery in the Fitbit with the higher charging rate. If the Fitbit recommends up to 2 to 2.2 amps, this device will work fine for you.
Sorry, there was a problem. Please try again later.Check the manual of your device
Sorry, there was a problem. Please try again later.Yes you can.
Sorry, there was a problem. Please try again later.You can charge all electronic items.
Sorry, there was a problem. Please try again later.I don't have a Fitbit Flex2 so I don't know. I use the outlet for my android phone, Kindle reader, and Nook reader. It works well for them.
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