Kombucha
Limit MacBook charging to extend battery lifespan
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A MacBook that stays on its adapter spends its life at 100%, where a lithium-ion cell ages fastest. Kombucha holds the battery inside a range you choose: it stops charging at the upper threshold and resumes at the lower one, so the Mac runs from the adapter while the battery rests. Also: Charge to 100% Once, Heat Protection, discharge to the limit, history charts, battery health. Free and open source (MIT), no network access or telemetry. Apple Silicon, macOS 15–26.
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More like this: all 379 launches in macos system utilities →
PH · launched Oct 24, 2026 · 2 upvotes (top 22%)
- Horizontal
- Prosumer
- Not AI
- Commercial product
- Mac
- Productivity
- Open Source
- GitHub
Similar launches
See all 228 similar launches →Could you build this?
Partial The UI and threshold logic are simple, but enforcing charge limits on a MacBook means controlling battery charging through low-level system interfaces. Those interfaces are undocumented and require privileged code, signing, and notarization.
What it would actually take: A real version needs a macOS menu bar app plus a privileged helper that writes battery-charging controls to the System Management Controller, using keys that vary by Apple Silicon and Intel generation. It must also cover sleep, wake, and adapter-state edge cases without damaging the battery or the power system. Expertise in macOS internals, reverse engineering, and Apple code signing and notarization is required, and existing open-source tools show the approach.
Competitors
Other products that read as similar to this one : 228 launches clear the similarity bar, closest 8 shown.
Attention rank: #66 of 229 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 335 days after the earliest competitor.
- bSaver · ph · 2026-10-28 · 2 upvotes · similarity 0.66
- Battery Orbit · ph · 2026-10-23 · 2 upvotes · similarity 0.62
- Wacchi · ph · 2026-10-18 · 1 upvotes · similarity 0.57
- BatteryBud for Mac · ph · 2026-10-10 · 4 upvotes · similarity 0.57
- Juicy - Mac Battery App · ph · 2026-07-10 · 228 upvotes · similarity 0.55
- Extra Cup · ph · 2026-10-06 · 1 upvotes · similarity 0.52
- Cyluma · ph · 2026-09-30 · 87 upvotes · similarity 0.51
- Voltyn · ph · 2026-10-06 · 1 upvotes · similarity 0.51
Other launches for this product
- No other launches for this product.