For other models not currently supported by Fitbit, search Google for your model and 'restart.

Wait 10 seconds after the device turns off, then press the Home button to turn it back on. Fitbit Surge: Press and hold the Home and Select buttons for 10-15 seconds until the screen flashes or the light starts to dim. Charger Cable for Fitbit Inspire 2 & Ace 3, for Fitbit Inspire 2 Fitness Tracker, Replacement Charging Cable Accessory for Fitbit Ace 3 (1m/3.3ft) Brand: SENGKOB 668 ratings 699 Get Fast, Free Shipping with Amazon Prime FREE Returns Size: 3.3ft 3.3ft 3.3 ft/1.Works with Inspire 2 only not compatible with Inspire. Ionic, Sense, and Versa: Press and hold the button for 10 seconds. Keep your Fitbit Inspire 2 fully charged with a slim charging cable that plugs into any USB port.Charge 5 and Fitbit Luxe: Swipe down on the clock face, tap Settings, choose Restart Device, then tap Restart.Charge 3 and Charge 4: Open the Settings app and select About > Reboot Device.Ace 2, Ace 3, and Inspire Series: Connect the tracker to a charger, press and hold the button or buttons on the tracker for 5 seconds, and then release.Ace and Alta series: Connect the tracker to a charger, press the button on the charging cable 3 times (with a few seconds between each press), and then disconnect the tracker once you see the Fitbit logo.Resetting the tracker can help fix this, but the steps to reset each model are different for every device. Occasionally, a problem with the tracker may be causing issues with the charging process.

Fitbit inspire charger