How to Check iPhone Battery Health and Make Your Battery Last Longer

If your iPhone dies by mid-afternoon, it might be your apps, or it might be a tired battery. Your iPhone can tell you which.

Battery Health shows your battery's maximum capacity compared with when it was new, and a couple of charging settings can slow down wear.

Battery Health shows Maximum Capacity: how much charge your battery holds compared with new. Apple generally considers a battery worn once it drops below 80%. Optimised charging and the charge limit on newer iPhones reduce the time your battery spends at 100%, which slows ageing.

Takes: 1 minute · Works on: iPhone 6 or later, iOS 11.3 or later · Cost: free, built into your iPhone

Settings > Battery > Battery Health

1. Open Battery. Open Settings and tap Battery.
2. Check the health. Tap Battery Health (or Battery Health & Charging) to see Maximum Capacity.
3. Protect it. iPhone 15 or later: tap Charging and pick a limit, like 80%. Older iPhones: turn on Optimised Battery Charging.
4. Find the drain. Back on the Battery screen, scroll down to see which apps use the most power.

💡 Below 80% Maximum Capacity? A battery replacement can make an older iPhone feel new again, for far less than a new phone.

• Turn on Low Power Mode from Control Centre when you're running low.
• Avoid leaving your iPhone in hot places like a car dashboard. Heat ages batteries fastest.
• iPhone 15 and later also show the cycle count in Settings > General > About.
• Only use chargers and cables from reputable brands.

Is 85% battery health bad?

No. It's normal wear. Apple says batteries are designed to keep around 80% capacity after hundreds of full charge cycles.

Should I charge to 100%?

It's fine when you need it. Limiting to 80% everyday can help the battery last longer if you don't need the full charge.