![]() You can try the USB hub of another device, like a power bank or laptop, that provides high amperage output. If you get an error message “ insufficient power source” on your Fitbit screen, remove the other connected devices from the power source or try another power source. ![]() The amperage rating of the USB hub on an extension board is not designed for any specific device. If you use an extension board with USB to charge your Fitbit, I recommend you try another USB hub. This will break the wax build-up, and your Fitbit will start charging again. To fix this, take a few drops of rubbing alcohol (isopropyl alcohol) on a microfiber cloth and rub it on the backside of the watch and the charger. ![]() Due to sweat and dust, a layer of wax is formed on the metal contacts, which prevents your Fitbit from charging. If you look at the backside of your Fitbit Versa 2, you’ll see four metal contacts touching the charger’s metal pins. ![]()
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