iPhone 7 smart battery case not working properly

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Jun 23, 2016
I have the same issue with the smart battery case.I plugged the phone at 29% to charge with the case on the phone plugged into the light cable on the bottom of the case .I check it at 32%. 0% in the notification for the smart case then at 39% I see the case at 3% charging.I reboot the phone the case freezes while charging with lighting cable. What can be the issue? they just replaced the case at the apple store. can the phone be the issue? what can I do?