Battery health differs in the Menu and macOS
(Updated: )Battery health and condition readings may differ slightly between CleanMyMac and System Settings in macOS because they use different methods to calculate these values. The exact reason for the difference is difficult to determine because Apple doesn't disclose details of its battery health calculation methods.
CleanMyMac calculates battery health based on the battery's physical capacity as reported by its driver software. This approach has been found to provide the most accurate representation of the battery's actual condition.
