How to Check iPhone Battery Health: A Complete 2025 Guide

Keeping your iPhone’s battery healthy is essential for smooth daily use. Whether you’re noticing slower performance or frequent charge cycles, knowing how to check battery health helps you take action early. In 2025, Apple continues to integrate powerful diagnostic tools directly into iOS, making it easier than ever to monitor your device’s battery condition.

What Is Battery Health and Why Does It Matter?

Battery health refers to the maximum capacity your iPhone’s battery can hold compared to its original state. Over time, lithium-ion batteries gradually degrade due to chemical aging, charge cycles, and heat exposure. When battery health drops below 80%, you may experience shorter battery life, slower charging, or the device shutting down unexpectedly. Maintaining healthy battery levels extends your iPhone’s lifespan and ensures reliable performance.

How iOS Shows Battery Health Now in 2025

Apple’s iOS 17 and 18 updates improved the battery diagnostics feature by simplifying access and adding clearer visuals. Here’s how to check your battery health step by step:

• Open Settings.
• Scroll down to Battery.
• Tap Battery Health.
• Select ‘Show Battery Health.’

If your battery shows a health percentage below 80%, Apple recommends replacing it. The app displays the current capacity and aging status, helping you track long-term performance. For iPhone 14 and newer models, this feature is fully integrated and requires no third-party apps.

What the Battery Health Percentage Means

A reading of 100% indicates a pristine battery, while numbers below reflect gradual wear. For context:

• 90–100%: Good battery health, minimal concern.
• 80–89%: Moderate degradation, consider monitoring usage patterns.
• Below 80%: Battery replacement advised to prevent sudden shutdowns and data loss.

Keep in mind that temperature and charging habits significantly impact battery health. Avoid exposing your iPhone to extreme heat above 35°C (95°F), as high temperatures accelerate degradation. Similarly, charging overnight or letting the battery drop below 20% regularly strains internal cells.

Practical Tips to Extend Battery Life

Beyond checking health, proactive habits preserve battery longer:

• Use Low Power Mode during intensive tasks to reduce strain.
• Limit background app refresh and disable location services when not needed.
• Charge between 20% and 80% whenever possible.
• Avoid fast charging on a daily basis; use standard charging instead.

These steps help maintain battery capacity and reduce the frequency of health drops.

When Should You Replace Your Battery?

Apple provides a clear recommendation: replace your battery when health falls below 80%. Imaging tests conducted in 2024 confirm that professional replacement restores performance close to original levels. Checking battery health annually ensures you act before major decline.

Final Thoughts: Take Control of Your Battery Now

Your iPhone’s battery is a key component that affects every interaction. By regularly checking battery health using iOS tools, you gain insight into its condition and can plan replacements proactively. Start today by opening Settings, navigating to Battery Health, and reviewing your percentage. Small actions today protect your device’s future.

Don’t wait for unexpected shutdowns—check your battery health now and keep your iPhone running at its best.