【Compatible Model】This Compatible with for Following Smartwatch Models: Fitbit Charge 5, FB421, FB421BKBK, FB421SRBU, FB421GLWT. as well as other compatible models.
【Tips】 For optimal performance, we recommend completing 2 or 3 complete cycles of charge and discharge with the new battery.
【Product Specifications】The package includes one replacement battery and a set of repair tool kits.
【About Our Battery】 We utilize the latest advanced technology to provide additional stable battery life and maintain battery health. Our batteries are brand new and have the same size as the original battery. The battery case is designed with high-quality materials, which provide strong protection for the battery and incorporate smart chips. Built-in A-class battery cells and IC chips ensure over temperature protection, over charging protection, over load protection, and sshort circuit protection.
【About Our Customer Service】 We strive to resolve all quality-related issues through replacement or refund. If you encounter any quality-related problems, please contact us at any time, and we promise to provide a satisfactory resolution within 24 hours.