Is Your iPhone Battery Dying in 2025? How to Check Health & When to Replace

iPhone Battery Health screen showing 100% capacity, used as an example of how to check battery health in 2025

Your iPhone battery is the heart of your device. Over time, it naturally wears down, and you’ll notice shorter battery life or performance issues. Apple gives you a built-in way to check battery health, but many iPhone users aren’t sure when it’s time for a replacement.

This guide explains how to check your iPhone battery health, the signs you need a new one, and why it matters for resale value.

 

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What is iPhone Battery Health?

iPhone Battery Health is a feature inside your settings that shows how well your battery is performing compared to when it was new.

  • Maximum Capacity (%): Tells you how much charge your battery can hold.
  • Peak Performance Capability: Shows whether your iPhone can still deliver full performance without unexpected shutdowns.

How to Check iPhone Battery Health

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Checking battery health takes just a few seconds:

  1. Open Settings.
  2. Tap Battery.
  3. Select Battery Health & Charging.

If your Maximum Capacity is above 85-90%, your battery is in good shape. Once it drops below 80%, you’ll see a message that says “Service Recommended.” That’s your sign it’s time to replace the battery.

Signs Your iPhone Battery Needs Replacement

Even before your battery health percentage drops, you might notice: Battery drains much faster than it used to. Phone shuts down suddenly, even with charge left. Slow or lagging performance. Longer charging times. Device feels hot while charging or during normal use. If two or more of these happen often, it’s likely time for a replacement

When to Replace Your iPhone Battery

Most iPhone batteries last around 2 to 3 years, depending on usage. Heavy users who game, stream, or use GPS daily may need a replacement sooner.

Apple recommends replacing the battery when health falls to 80% or lower. Doing so not only keeps your iPhone running smoothly, but also protects its trade-in or resale value.

 

How Battery Health Impacts iPhone Resale Value

When you go to trade in or sell your iPhone, battery condition matters.

  • Carriers and resellers often check battery health.
  • Phones with poor battery health may get a lower trade-in offer.
  • Replacing the battery before selling can boost your payout and make the phone more attractive to buyers.

OEM vs Aftermarket iPhone Batteries

Not all replacement batteries are created equal.

  • OEM (Original Equipment Manufacturer): These match Apple’s original specs, offering reliable performance and safety.
  • High-Quality Aftermarket: A safe alternative that performs close to OEM, often at a lower cost.
  • Cheap Knockoffs: These can cause overheating, swelling, or even permanent damage.

For safety and performance, always choose OEM or premium aftermarket batteries.

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Professional iPhone Battery Replacement

Replacing an iPhone battery isn’t just about swapping parts. A professional repair shop ensures:
  • No damage to your screen, board, or Face ID system
  • Your data stays safe
  • Warranty-backed parts and service
DIY battery swaps may seem cheaper, but one mistake can cost more than a professional repair.

Compare Local vs Apple →

iPhone Battery Replacement in Detroit

If you’re in Metro Detroit and need a battery replacement, iMobile Repair Center has you covered.
  • Same-day service on most iPhone models
  • Certified parts with warranty
  • Fast, friendly repairs from trusted local technicians
Whether your iPhone dies too quickly or you’re preparing it for resale, we’ll make sure it feels like new again.  

See Full Cost Guide →

Looking for battery costs on a specific iPhone model? Need a new iPhone battery in Detroit? Stop by iMobile Repair Center or call us today for quick, reliable service with warranty-backed parts. Walk-ins welcome!