iPhone battery health

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Open Settings > Battery > Battery Health & Charging. "Maximum Capacity" is the headline number. On iOS 17.4 or later you'll also find the cycle count there or under Settings > General > About. Enter both above for a full read.

Above 90% is great, 85 to 90% is normal for a phone around two years old, and 80 to 85% is worn but workable. Apple's own service threshold is 80%: below that you qualify for a free AppleCare+ battery replacement and peak performance can be affected.

For a 2 to 3 year old iPhone, 85% is completely normal. You'll notice shorter days than when it was new, but nothing is wrong. If you plan to keep the phone past the 3-year mark, treat the battery gently from here: it's close to service territory.

iPhone 15 and later are rated to keep 80% capacity for 1,000 complete cycles, double the 500-cycle rating of iPhone 14 and earlier. A typical user adds 300 to 400 cycles a year, which is why older iPhones often hit the 80% line around year two or three.

With AppleCare+, free once health is below 80%. Without it, Apple charges roughly $69 to $99 for most recent models and up to $119 for the newest Pro models (US prices as of 2026). A fresh battery is the single cheapest way to make an old iPhone feel new.

Roughly, yes, but it's rounded and it lags: the displayed percentage recalibrates slowly and can sit frozen for weeks. The battery chip itself stores precise capacity in mAh, exact cycles and temperature. Juicy reads those raw values when you plug your iPhone into your Mac.

The same logic applies, though iPadOS only shows battery health in Settings on newer iPads. For any iPad, plugging it into a Mac running Juicy reads the real health, cycles and capacity directly from the battery.

Heat is enemy number one: avoid hot cars, direct sun and charging under a pillow. Use the built-in 80% charge limit (iPhone 15 and later) or Optimized Battery Charging, and don't obsess over partial charges, lithium batteries prefer them. Your Mac deserves the same care, by the way.