Battery health is one of the first things a buyer checks on a used iPhone. It tells you how much charge the battery can hold compared with when it was new, and it has a direct effect on what your phone is worth.
How to check battery health on an iPhone
Open Settings > Battery > Battery Health & Charging. Maximum Capacity is the number buyers look at. On iPhone 15 and later you can also see the cycle count in Settings > General > About.
How battery health changes your price
At SellEazy the price for battery condition works like this:
| Battery health | Effect on price |
|---|---|
| Above 80% | Best price, no deduction |
| 60% to 80% | Lower offer |
| Below 60% | Larger deduction |
Apple considers a battery worn once it drops below 80%, which is why it is the dividing line. You can see the effect on your exact model in the price tables on our model pages, for example the iPhone 13 or iPhone 15 Pro Max.
Should you replace the battery before selling?
Do the maths for your model first:
- Check your iPhone's price with battery above 80% and with your current battery health, using the instant quote.
- Compare the difference with the cost of a genuine battery replacement.
- Replace only if the price difference is clearly higher than the cost.
For recent models with very low battery health, a replacement can be worth it. For older iPhones it rarely pays back. Avoid cheap non-genuine batteries: iOS flags them as "Unknown part", and buyers price those phones lower.
How to keep battery health high while you use the phone
- Turn on Optimised Battery Charging (or the 80% charging limit on newer iPhones).
- Avoid leaving the phone in a hot car or charging it under a pillow; heat wears batteries fastest.
- Use a certified charger and cable.
What else affects your iPhone's price
Battery is one factor. Screen and body condition, warranty, storage and accessories matter too. See the full iPhone resale value list for current prices by model.
Sell your iPhone with doorstep pickup
SellEazy picks up anywhere in Delhi, Faridabad, Gurugram, Noida and Ghaziabad, usually within 24 hours of booking. The phone is inspected in front of you, and once you accept the offer you are paid the same day by UPI, bank transfer or cash, with a PDF receipt for the sale.
Frequently asked questions
Does battery health affect iPhone resale value?
Yes. At SellEazy, battery health above 80% keeps the best price. Below 80% the offer drops, and below 60% it drops further, because the next owner will likely need a battery replacement.
Should I replace my iPhone battery before selling?
Usually only if health is well below 80% and you can get a genuine Apple battery at a fair price. Compare the replacement cost with the price difference for your model; for older iPhones the replacement often costs more than it adds.
What does "Unknown part" or "Service" mean in battery health?
It means the battery was replaced with a non-genuine part or needs service. Buyers price these phones lower, so mention it honestly in the quote.
How do I check battery health on Android?
Samsung phones show battery status in the Samsung Members app under diagnostics. Many other Android phones show it in Settings > Battery. If your phone has no battery health reading, describe how long a full charge lasts.