Dismissing the Connect Sync Service Notification
Android phones will notify you about apps running in the background:
The Garmin Connect™ app needs to run in the background to provide you with connected features like notifications and weather updates, and to sync data to your account.
Steps to Turn Off This Notification
This dismisses the notification without affecting the app's background operation.
Open the Garmin Connect app.
Select More (bottom right).
Select Settings.
Select Phone Permissions.
Select Manage Permissions.
Select Notifications.
If present select Notification categories.
Uncheck or toggle off Device Connectivity.
I Am Seeing a Battery Usage Message
It's normal to see a notification about Garmin Connect using battery resources. All Android apps that run in the background will impact your phone's battery life to some extent.
To hide this battery usage notification:
From your phone, swipe down from the top of the screen to display your notifications.
Press and hold the Battery notification.
Select the option to turn it off.
Tap Done.
Why Does the Connect Sync Service Notification Pop Back Up?
This notification might reappear after you reboot your phone. Simply opening the Garmin Connect app will dismiss it again.