Which Macs are supported?

macOS 13 Ventura or later. Sonoma, Sequoia, and whatever ships next. Every Apple Silicon Mac. Intel MacBooks too.

How much does Battery Sensei cost?

$3.99 once, lifetime license. Lifetime unlock: up to 3 Macs you own. No subscription. Free for 5 days first. No card, no account. When the trial ends, Sensei asks once at launch. Skip the purchase and the core stays free forever: charge limit, Travel Mode, smart alerts, 24-hour history, per-app drain, live menu-bar watts. Premium adds Meeting Battery Guard, unlimited history, and custom warning rules. Checkout shows your local currency.

How does the license key work?

After checkout, your key arrives by email. Open Sensei → Settings → Premium and paste it in. Activates against Polar, stores locally. No account. No login. Lifetime unlock: up to 3 Macs you own. Yearly Patron: up to 5 Macs while subscribed.

Yes. 14 days, no questions asked. Email us and the refund goes back to the original card. Polar handles the payment.

How does the charge limit work?

Sensei stops the charge at the level you pick. Default is 80%: cooler battery, longer life. Travel Mode is one click. Sensei tops up to 100% at full speed, with no macOS slow-down on the last 20%. Returns to your limit when you are home.

Does Sensei send my data anywhere?

No. Nothing leaves your Mac. No telemetry. No analytics. No cloud account. Your battery history stays on this machine.

How is Battery Sensei different from the macOS battery menu?

macOS shows you a percentage. Sensei reads the rest. Smart low-battery alerts at thresholds you choose. A charge limit with Travel Mode. Live charging watts. Cycle and capacity over time. Plus a calm, plain-English history of how your battery is aging.

How much battery does Sensei itself use?

Less than 1%. Native AppKit and SwiftUI. No background polling. Sensei samples only when macOS reports a change.

Is Battery Sensei an AlDente alternative?

Yes. Sensei covers AlDente's charge limit in every tier, plus smart warnings and a battery history. Ships as one notarized .pkg installer. Premium adds Meeting Battery Guard, unlimited history, and custom warning rules. One payment, lifetime. Side-by-side comparison lives in the Compare section above.

How do I update Battery Sensei?

Sensei checks for updates on launch. A new build shows up as a quiet notice. You install when you say so. No silent pushes, no nag screens.

How does Meeting Battery Guard work?

Opt-in Premium feature. Sensei reads your calendar locally and predicts which meetings your battery might not survive. When a meeting is at risk, you get up to four nudges: 30, 15, and 5 minutes before start, plus one at the start time. Each nudge names the exact minute the laptop is predicted to die ("dies 17 min into standup") and the plug-in time that clears it ("22 min on the charger and you're through"). Event titles never leave your Mac. Sensei reads the calendar locally via EventKit. If the risk passes, pending reminders cancel silently.

Glossary

Glossary · 用語

Design capacity.

Name: Battery Sensei
Availability: InStock
Author: Battery Sensei

Design capacity is the original mAh (or Wh) capacity your MacBook’s battery was built to hold when new. Current capacity is measured against this baseline to produce the Battery Health percentage.

Design capacity is set at the factory and lives in the battery’s firmware. It never changes unless the cell is physically replaced.

Knowing both design and current capacity gives you Battery Health by simple division — current ÷ design × 100. macOS hides design capacity from the user; third-party tools, including Battery Sensei, surface it alongside the live percentage.

Why it matters when buying used: a Mac advertised at “95% capacity” after a third-party battery swap may have a smaller replacement cell — 95% of a reduced design capacity hides the real wear. Always check design capacity alongside the percentage.

Battery health
Cycle count

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