Phones / Apple / iPhone 17 Pro Max / Battery health

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iPhone 17 Pro Max battery health

Is this battery health normal for the phone’s age, and when does a replacement make sense? Sourced figures stay sourced. Wear and the band are estimates.

How to read the health percentage

The percentage is capacity relative to a new battery. On an iPhone it is Maximum Capacity. On Android it is the manufacturer’s battery-health figure, when the phone shows one.

Open Settings → Battery → Battery Health (on some models and iOS versions: Battery Health & Charging).
Maximum Capacity is the current capacity relative to new. Recent models also show the cycle count under Settings → General → About.

Apple’s guide: iPhone battery and performance

EU rated cycles 1,000 Full charges until about 80% of original capacity, from the EU label. EPREL (2026-10-16)

About 80% around 15 Jun 2028 Estimate. One full charge a day from the release date, the same basis as the ownership timeline. Not a promised date, and not a screen age. Estimate

Expected health today 91.7% Estimate. A straight line from 100% at launch to 80% when the rated cycles are used up. Estimate

User-replaceable No source

Crowd median Crowd data is not ready yet. A median is shown only after at least 5 moderated readings for this model. We do not invent a percentage. A form for new readings is not on this page. Later submissions need moderation, and they must not include personal data.

Official battery replacement

The official part price is published in more than one country shop. It is on the part-price page after you choose a country. We do not pick a shop here.

Apple repair manual

Apple parts and repair portal

Check a percentage you can see

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Your reading

Enter the health percentage from the phone. These inputs stay in this browser. Nothing is sent.

How this reading is made

Maximum Capacity on iPhone, and the manufacturer battery-health figure on Android, are read from the phone. The steps are the ones already published on the battery-ratings page. We do not invent a menu.
EU rated cycles come from the EPREL product sheet, with its https source. They run until about 80% of original capacity. A missing count stays “Not estimated”.
Expected wear is an Estimate, and only when a release date and a rated cycle count both exist. One full charge a day from the release date, the same basis as the ownership timeline. The window ends on the day those cycles are used up, when the straight line reaches about 80%. Past that day we do not estimate a percentage under 80%. An age you type replaces the launch age in the interpreter only. It is not a screen age.
The band is an Estimate of when a replacement makes sense. Under 80%: consider a replacement. From 80% up to but not including 90%: watch. 90% or more: healthy, unless the cycle count you enter, or the age at one full charge a day, has already used the rated cycles — then watch, while health is still 80% or more. The 90% edge is an Estimate.
The official battery price is the manufacturer part price for this country view. English pages do not pick an Apple shop when more than one country publishes a price. Labour and shipping appear beside the part maximum only when a sourced euro exists for that part and country. A maker service price that already includes the part is shown beside it and is not added on top. A missing euro is left out.
The crowd median uses moderated readings only, and only when this model has at least 5. Fewer than that, the page says crowd data is not ready. We do not invent a percentage.

Still open: moderated crowd readings (the file can stay header-only until then), and a sign-off before this preview is indexed. This page does not collect a reading.

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