Matches macOS
The condition is read from the system, so a service warning agrees with System Settings.
True battery health
Why does your battery say 100% when it isn't?
WhatBattery works from the battery's raw capacity figures, not the number System Settings rounds to, and shows it to one decimal place alongside cycle count and service condition.
No false precision, no hidden rounding
A rounded 100% hides the first signs of wear.
System Settings presents a whole number, so anything from 99.5% up reads as 100%. Fine at a glance, useless for spotting a trend. WhatBattery works from the underlying mAh figures and keeps one decimal place.
It also shows cycle count, temperature, voltage, the current charge state, and the same Normal or Service Recommended condition macOS uses. Where macOS's own capacity percentage differs from the unrounded figure, both are shown rather than leaving you to wonder which is right.
- Health computed from nominal capacity ÷ design capacity
- Apple's own service condition, not a competing verdict
- macOS's rounded figure shown alongside when the two differ
- Health, cycles and condition are free; the raw mAh capacities are Pro, in the app and the CLI alike
The honest boundary
It tells you what the battery reports and what cannot be known.
There is no dependable public signal that proves a battery is genuine. WhatBattery does not add a green “genuine” badge to incomplete evidence. It shows the service condition, capacities, health, cycles, and identifiers the system can actually support.
Does not control charging
WhatBattery observes. It never enforces a charge limit or writes to the battery.
Keeps missing data missing
If the system refuses a reading, the app shows that it is unavailable instead of guessing.
Check the real health of your Mac battery.
Free on Apple Silicon Macs running macOS 14 or later.