True battery health
Unrounded health, raw capacity, cycle count, service condition, and the facts macOS leaves out.
Explore battery health →WhatBattery features
Turn battery data into useful answers.
What's true right now, what's using the power, and how it's changing over time.
Live power and apps
Watts in and out, temperature, voltage, charger details, and your own processes ranked by power.
Explore power analysis →Sleep diagnosis Pro
See what happened while your Mac slept: charge lost, wake count, wake reasons in plain English, and what's holding it awake right now.
Explore sleep diagnosis →History and runway Pro
Follow health over months, see the pack's own per-cell detail, and project when the battery may reach Apple's 80% service threshold.
Explore the long view →iPhone and iPad Pro
Read the battery directly from your Mac over USB or Wi-Fi, with no device-side app.
Explore connected devices →Bluetooth accessories
See keyboard, mouse, trackpad, and AirPods levels free. Pro forecasts how long is left and warns you before they die.
See accessory forecasts →Reports and export Pro
Create a one-page battery report or export the underlying history as CSV or JSON.
See reports and export →Built to be checked
Read-only, unprivileged, and open source.
WhatBattery does not install a daemon, kernel extension, or charging controller. It reads Apple's battery and power interfaces, and when a value isn't available, it says so rather than guessing.
- No root access
- No automatic battery-data uploads
- No invented values when hardware reports nothing
- Source available on GitHub
Start with the battery numbers macOS hides.
The essential Mac view is free. Pro adds history, forecasting, deeper diagnosis, and connected devices.