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.

• Menus differ by manufacturer and Android version. Look under Settings → Battery, or search Settings for “battery health”.

If your phone shows no health figure, the manufacturer’s service centre can test it. We do not invent a menu.

Official battery replacement

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.

Current health %Maximum Capacity on iPhone, or the manufacturer battery-health figure on Android. Approximate age in months (optional)Months since you bought it. Leave this blank to use the months since launch. This is not a screen age. Cycle count, if the phone shows one (optional)Only a count the phone displays. We do not guess one.

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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