If your Fitbit Ace LTE battery is not charging after you've followed the steps to Charge Fitbit Ace LTE, try these fixes.
Important: The Fitbit Ace LTE will only charge when placed in the correct orientation. The charger’s power cord should be on the same side as the buttons.
Step 1: Confirm that you're using a compatible charger
Step 2: Clean the watch and charger
Step 3: Confirm there is a connection to the charger