Set a charge limit in macOS Monterey and later

macOS Monterey (released in 2021) and all newer versions include a built-in feature called Optimized Battery Charging that lets you cap your MacBook's maximum charge at 80 percent. This is the simplest way to limit battery percentage, and it requires no third-party software or terminal commands.

Open System Settings (or System Preferences on older versions), then click Battery in the sidebar. Under the "Battery Health" section, you'll see a checkbox for Optimized Battery Charging. Check this box. Your MacBook will now charge only to 80 percent during normal use, extending the lifespan of your battery by reducing stress from constant full charges.

The system learns your charging patterns and may occasionally charge to 100 percent if it predicts you'll need full power soon—for example, if you usually unplug your MacBook at 7 a.m. and it's currently 6:45 a.m. This is automatic and you cannot disable it for specific days. If you need 100 percent charge right now, you can manually disable Optimized Battery Charging temporarily, charge to full, then re-enable it.

Key Takeaways

  • Optimized Battery Charging, built into macOS Monterey and later, limits your charge to 80 percent by default and is the official Apple method.
  • You turn it on in System Settings under Battery > Battery Health, and it requires no additional software or technical steps.
  • Your MacBook may occasionally charge to 100 percent if the system predicts you'll need it soon based on your usage patterns.
  • Limiting charge to 80 percent reduces wear on the battery chemistry and can add months or years to your battery's usable life.
  • If you have an older Mac running Big Sur or earlier, Optimized Battery Charging is not available and you will need a third-party tool.

Why you might want to limit your charge

Lithium batteries—the type in all modern MacBooks—degrade faster when held at 100 percent charge for long periods. Each charge cycle wears the battery slightly, but keeping the battery at full capacity between uses accelerates that wear. Over time, a battery charged to 100 percent every day will lose capacity faster than one charged to 80 percent.

If you use your MacBook plugged in most of the time—at a desk, in an office, or at home—your battery spends many hours at full charge even when you're not using that power. Capping the charge at 80 percent means your battery sits at a lower stress level during those idle hours, which measurably extends how long it will hold a useful charge.

This matters most if you plan to keep your MacBook for several years. A battery that degrades slowly will still deliver 80 percent of its original capacity after three or four years; one that degrades quickly may drop to 60 or 70 percent in the same time. The 20 percent you give up by not charging to 100 percent is usually more than offset by the battery lasting longer overall.

What happens when Optimized Battery Charging is on

When Optimized Battery Charging is enabled, your MacBook will charge to 80 percent and then stop, even if it remains plugged in. The battery will not charge further unless you manually turn off the feature or until the system predicts you need full capacity.

You can see your current charge level and the 80 percent cap by clicking the battery icon in the menu bar at the top right of your screen. The percentage shown is your actual charge; the system does not hide the fact that you're at 80 percent rather than 100 percent.

If you're traveling or know you'll be away from power for a long time, you can temporarily disable Optimized Battery Charging to charge to 100 percent. Go back to System Settings > Battery > Battery Health and uncheck the box. Your MacBook will charge to full on the next plug-in. Once you're done, re-enable the feature by checking the box again.

Checking your battery health status

In the same Battery Health section of System Settings, you can see your battery's current condition. Apple rates battery health as "Normal" (80 percent or more of original capacity remaining), "Service Recommended" (below 80 percent), or "Service Battery" (significantly degraded). This is informational only and does not change your charge settings.

The percentage shown here is your battery's maximum capacity compared to when it was new—not your current charge level. A battery at "Normal" health might still be at 85 percent capacity even after two years of use. A battery at "Service Recommended" has degraded enough that Apple suggests you consider a replacement, though it will still work.

For older Macs without the built-in feature

If you're running macOS Big Sur or earlier, Optimized Battery Charging is not available in System Settings. You have two options: update your operating system to Monterey or later if your Mac supports it, or use a third-party tool.

Third-party applications like Aldente or Battery Health 3 can set a charge limit on older Macs, but they require installation and ongoing use. These tools work by communicating with your Mac's charging hardware to stop charging at your chosen percentage. They are generally reliable, but they add a background process to your system and may not receive updates if the developer stops maintaining them.

Updating your Mac to the latest supported macOS version is the simpler long-term solution if your hardware is compatible. You can check which macOS versions your Mac supports by going to System Settings > General > About and looking at the "System Report" button, or by visiting Apple's official compatibility list for each macOS release.

Common mistakes and how to avoid them

The most common mistake is forgetting that Optimized Battery Charging is on and then wondering why your battery stops charging at 80 percent. If your MacBook suddenly stops charging before reaching 100 percent, check System Settings > Battery > Battery Health to confirm the feature is enabled. This is normal behavior, not a malfunction.

Another mistake is disabling Optimized Battery Charging and forgetting to turn it back on. If you disable it to charge to 100 percent for travel, make a note to re-enable it when you return. Leaving it off means your battery will charge to full every day, undoing the benefit of the feature.

Do not assume that Optimized Battery Charging will prevent your battery from ever reaching 100 percent. The system is designed to learn your habits and occasionally charge to full if it predicts you need it. This is intentional and helps may support you have power when you need it most. You cannot override this behavior on a day-by-day basis without disabling the feature entirely.

Frequently Asked Questions

Will limiting my charge to 80 percent affect my MacBook's performance?

No. Your MacBook will run at full speed whether it's at 80 percent or 100 percent charge. The only difference is how long the battery will last before needing to recharge. Performance is not affected by the charge level.

Can I set a different limit, like 70 percent or 90 percent?

The built-in Optimized Battery Charging feature in macOS only offers 80 percent as the limit. If you need a different percentage, you would need to use a third-party tool like Aldente, which allows custom limits. Apple's official feature does not provide this option.

What if my MacBook needs to charge to 100 percent for a specific task?

You can temporarily disable Optimized Battery Charging in System Settings > Battery > Battery Health, charge to 100 percent, and then re-enable it. Your MacBook will charge to full on the next plug-in after you uncheck the box.

Does Optimized Battery Charging work when my Mac is in sleep mode?

Yes. Optimized Battery Charging works whether your MacBook is awake, asleep, or shut down. The charging hardware respects the 80 percent limit regardless of your Mac's state.

If I sell my MacBook, should I disable this feature first?

You do not need to. Optimized Battery Charging is a user-level setting that will be wiped when the new owner erases and sets up the Mac. You can leave it enabled or disabled—it will not affect the sale or setup process.