Battery health
Real full-charge capacity versus the original design — as a percentage, not a guess. Watch the wear happen.
Menu-bar utility · macOS
Everything your Mac battery
isn’t telling you.
Health, cycle count, temperature, per-cell voltage, and live charging power — the full picture macOS hides, one click away in your menu bar.
Free · Native Swift · Apple Silicon & Intel · macOS 13+
What it shows
The readout Apple keeps to itself.
Cycle count
The number macOS buries three menus deep in System Information, kept in plain sight.
Temperature
Live cell temperature, color-coded so you notice heat before it becomes a problem.
Charging power
Exactly how many watts are flowing in, the charge current, and your adapter’s real output.
Per-cell voltage
Every cell’s voltage, side by side, so an unbalanced pack has nowhere to hide.
Time & draw
Honest time-to-full and time-to-empty, plus instantaneous watt draw as you work.
Light or dark
Right at home either way.
The panel adapts to your system appearance, with a battery gauge that fills to your real charge and turns green the moment you plug in.
Under the hood
Native. Tiny. Honest.
No Electron, no web view, no background CPU hog — just AppKit reading Apple’s own IOKit battery data and refreshing every few seconds.
0Electron
Swift+ AppKit, fully native
IOKitreads the real source
5slive refresh
Put it in your menu bar.
Free and native. One line installs it and opens it — no Gatekeeper prompt.
curl -fsSL https://dl.batteryinfo.app/install.sh | bash Installs BatteryInfo to Applications and launches it. Nothing to sign in to.
or
↓ Download the .dmg
Requires macOS 13+. The app is unsigned, so if macOS blocks the .dmg,
clear the download flag once:
xattr -dr com.apple.quarantine ~/Downloads/BatteryInfo.dmg