Hello, Welcome to the Community. We understand the concern of receiving a battery warning in the diagnostics of the Members app. This could indicate a hardware failure, especially if you are experiencing battery concerns. We recommend having the phone evaluated by an authorized service location.
You can use the following link to find a list of service centers in the U.S. that can do the repair: http://www.samsung.com/us/support/service/location or by contacting customer support at 1-800-726-7864.
