Articles • 2026-08-27 • 3 min read

How to read Battery Health on iPhone, and why battery below 80% deducts from the price.

#battery health#iPhone battery#check battery

Check battery health before selling — how much does it affect price?

The battery is the only wear part you can check as a number, so shops use it as a straight, transparent deduction rule.

How to read Battery Health

  1. Open Settings on your iPhone
  2. Go to Battery > Battery Health & Charging
  3. Look at Maximum Capacity — that is current health versus new

iPad has no direct reading — judge by charge cycles and fast drain instead. Apple Watch shows it at Settings > Battery > Battery Health too.

What number triggers a deduction?

The common shop rule is 80%. Below it, the battery is worn enough to need replacing before resale, so there is a fixed deduction every time. Above 80% there is no deduction at all, whether 81% or 100%.

Should you replace the battery before selling?

Usually no — an official replacement costs more than the deduction. Just report the honest number when you get a quote and the system calculates it for you.

Battery at 85%+ with a clean body is the dream combo. Checked it? Bring your device for a quote right away.

Done reading? Check your device price

Check price now