iPhone battery health: is 80% good?

Where to see it

Settings › Battery › Battery Health (or "Battery Health & Charging"). "Maximum Capacity" compares the battery with when it was new: 90% means it holds 90% of its original charge.

Which number is good?

• 90 to 100%: like new, original battery life or close to it.
• 80 to 89%: healthy. Normal wear for an iPhone used for a year or two; it lasts a normal day.
• Below 80%: Apple considers the battery worn. Battery life drops noticeably and the iPhone may recommend a replacement.

Apple says an iPhone battery is designed to keep 80% of its capacity after 500 full charge cycles (1,000 cycles for iPhone 15 and later). That's why, with us, a battery at 80% or more is graded "good", and a phone below 80% is sold for less.

What about Samsung?

Galaxy phones don't show a percentage in Settings. Our technicians test the battery with the built-in diagnostics of the Samsung Members app, and watch its consumption, before sale. The condition is shown on the page.

Making your battery last

• Avoid heat: don't leave the phone in the sun or in a closed car.
• Turn on "Optimised Battery Charging" (and, on iPhone 15 and later, the 80% charge limit).
• Use a good-quality charger.