This paper explores the significance of the serial number embedded within Apple lithium-ion batteries. As counterfeit batteries proliferate in the repair market and safety concerns regarding lithium-ion technology persist, the ability to verify a battery’s provenance has become critical. This document details the methods for locating and verifying serial numbers, distinguishes between "Soft" and "Hard" serials, and analyzes the role of these identifiers in maintaining device integrity and user safety.

Depending on your device, the method for finding the battery's specific serial number varies. Hold the Option key and click the Apple menu () . Select System Information . In the sidebar, click Power under the "Hardware" section.