Hi @suriya26091994, welcome to Anker Community.
Thank you @TechnicallyWell for the correct answer. There is no need to register your Anker product for warranty purposes. All Anker products that purchase from AnkerDirect have a-18 Month Hassle Free Warranty.
Please contact us to firstname.lastname@example.org and provide your receipt, the serial number If you have any questions in the future, then we will help you with your issue.
Thank you again for your time. Have a great day!