To disable iPhone performance throttling in iOS 11.3, open Settings, tap Battery, tap Battery Health, and turn off the performance-management feature if it appears. This toggle only shows up after an unexpected shutdown has occurred on a supported iPhone, and it is not a universal switch for all performance management.
What you need to know before you disable iPhone performance throttling
The toggle in iOS 11.3 is not a permanent or universal control. It appears only on specific iPhone models after the device has experienced an unexpected shutdown due to battery age. Apple stated that the throttling feature would be applied intermittently, depending on various factors such as battery age, charge level, and temperature. If another unexpected shutdown occurs after you turn it off, the feature automatically re-enables itself. This means you cannot set it and forget it; the system will reactivate performance management if it detects the battery can no longer support peak power demands.
Supported iPhones for the performance management toggle
The performance-management feature applies exclusively to iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE (1st generation), iPhone 7, and iPhone 7 Plus. The feature was first implemented in iOS 10.2.1 for iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, and iPhone SE, and later expanded to iPhone 7 and iPhone 7 Plus with iOS 11.2. Devices older than iPhone 6 do not have Battery Health in iOS 11.3, and newer models are not subject to this specific throttling mechanism.
How to turn off performance management in iOS 11.3
- Open the Settings app.
- Tap Battery.
- Tap Battery Health.
- If the performance-management feature is shown, turn it off.
If you do not see the option, your iPhone has not experienced an unexpected shutdown, or your device is not among the supported models.
What happens after you disable the feature
Once you turn off performance management, your iPhone will no longer deliberately slow its peak performance to prevent shutdowns. This restores full processor speed, which can make apps launch faster and animations feel smoother. However, the trade-off is an increased risk of unexpected restarts if your battery cannot supply enough instantaneous power under heavy load. If you experience frequent shutdowns after disabling performance throttling, it may be an indication that you need to replace your battery. If another shutdown occurs, iOS will automatically turn performance management back on. You may also want to know how to turn on battery saver if you find your battery drains more quickly after disabling throttling, or what happens if you start turning off optimized charging to preserve long-term battery health. If your device stops charging entirely, you might need to revive a battery that won't charge before you can access these settings. And if you suspect an app is draining power, you can check for battery draw in the Battery section of Settings.
Can all iPhone throttling be disabled?
No. The Battery Health toggle only controls the performance-management feature tied to unexpected shutdowns. Apple does not provide a way to disable fundamental safety protections, such as temperature-related throttling or internal voltage management. Those core safeguards remain active regardless of the toggle setting, because they are necessary to prevent hardware damage.
Frequently Asked Questions
Can I turn off performance throttling before any slowdown happens?
No. The toggle appears only after an unexpected shutdown has occurred on a supported device. If your iPhone has never shut down unexpectedly, the option will not be visible in Battery Health.
Will the feature stay off permanently?
No. If another unexpected shutdown occurs after you disable performance management, iOS will automatically re-enable it. You can turn it off again, but the system will keep reactivating it after each shutdown.
Does disabling throttling damage my battery?
Disabling the feature does not directly damage the battery, but it increases the likelihood of unexpected shutdowns under heavy load. Frequent deep discharges and repeated shutdowns can accelerate battery wear over time.
Is this setting available on iPhone 8 or later?
No. Newer models use different power management and do not show this option.
What should I do if my iPhone keeps shutting down after I disable throttling?
If you experience repeated unexpected shutdowns, your battery likely cannot deliver sufficient peak power. Consider replacing the battery through Apple's service program. You can also re-enable performance management to prevent further shutdowns until you get a replacement.
