Can I replace my iPhone’s battery even though it’s 87%?

Apple typically will not replace a battery in iPhone until it reaches a battery health of 80% or less. If you are selling the phone to someone and you want them to be able to get the battery replaced when it's time, depending on the model, reduce your price by the cost of an authentic Apple Battery repair, which is either $49 or $69, depending on model.

Open Settings ➢ Battery ➢ Battery Health.

If the Maximum Capacity is 80% or less, then it’s time to replace the battery.

iPhone Battery Replacement:

Current Apple Prices:

• No charge for in-warranty or AppleCare+ plan.

Out of Warranty Prices:

• iPhone 14 or newer: $99 U.S. Dollars.
• iPhone X to iPhone 13: $69 U.S. Dollars.
• Older models: $49 U.S. Dollars.

➢ Check AppleCare Coverage.

Click ▶︎ iPhone Battery Replacement.

You can ask them, but typically no.