According to the announcement, the faulty Smart Battery Case can’t be charged or would only charge intermittently. At the same time, the same case also happened when users tried to use them to charge their iPhone XS, iPhone XS Max, or iPhone XR.
As opposed to products such as MacBook, the eligibility for replacement can’t be determined through serial number. Hence, you need to bring the Smart Batter Case directly to your nearest Apple Authorized Service Provide for further inspection. Then again, if you Smart Battery Case already showed the symptoms listed above, then you already know that it needs to be replaced. For further information, head on to Apple Malaysia’s website right here. (Source: Apple.)