Hi everyone! I made Kombucha, a small menu bar app that keeps a MacBook's battery inside a charge range you choose (default 80% stop / 75% resume), so a Mac that lives on its adapter doesn't sit 100%. My MacBook sits on the adapter all day, and I wanted a free, open-source way to keep the battery healty. What it does: - Stops charging at your upper limit and resumes at the lower one - Charge to 100% Once when you need a full battery for a trip - Heat Protection: pauses charging at 40 °C - Discharge to the limit with the cable still plugged in - 7- and 30-day history, battery health, notifications, Shortcuts It's free and open source (MIT). A small helper writes only two SMC keys, and the app has no network access, accounts or telemetry. Install with Homebrew (brew install --cask askuksov/tap/kombucha) or the notarized download on GitHub. It works on Apple Silicon MacBooks with macOS 15–26. I'd love feedback: does it hold the limit on your Mac, and what's missing?

Kombucha

Limit MacBook charging to extend battery lifespan

Limit MacBook charging to extend battery lifespan