Iphone 15 plus already at 51% battery health

My top 3:

1)Verify Warranty and AppleCare+ Eligibility: An iPhone 15 Plus owned since October 2023 that has degraded to 51% battery health after 1008 cycles, falling well below Apple's expected 85% retention after 1000 cycles.  

 2)Check Free Replacement Coverage: If the device is covered under an active AppleCare+ plan or is experiencing a premature hardware failure defect while still under standard consumer law or warranty exceptions, a battery replacement may be fully covered.

 3)Inspect Battery Calibration and Diagnostics: Run a remote diagnostic through Apple Support or visit an Apple Store to determine if the extreme drop (down to 51%) is due to a faulty battery management system cell reporting error or physical cell degradation.

Good Luck 🍀

Go to this web site for information about how to request battery service for your iPhone: Apple Service and Repair for iPhone Battery - Apple Support

For cost and availability, enter your model information in the "Get an estimate" box at the bottom. (It is best that you do this since sometimes contributors here forget this is an international forum and not everybody asking questions lives in the contributor’s country.)

For instructions on how to get your iPhone, iPad, or iPod touch ready for service click here --> Prepare your iPhone or iPad for a service appointment - Apple Support

Since you want special consideration you should contact Apple and discuss this with them. Install the mobile Apple Support app and contact Apple using that. You can then optionally allow Apple technicians to have direct access to diagnostic data from your device. Alternatively, take or send it in for diagnosis:

Go to this page to find your nearest Apple Authorized Service Provider (AASP) or Apple Authorized Distributor (AAD) --> https://locate.apple.com/country

How to make a Genius Bar appointment

1. Go to Genius Bar Reservation and Apple Support Options - Apple

2. Go to "Get hardware help".

3. Select your hardware and continue selecting options requiring replacing parts until you see "Bring in for Repair"

4. Sign in with your Apple Account

This support page has information about contacting Apple support and service ➔ Contact Apple Support - Apple Support If live support options (chat and/or telephone) are available they will show near the bottom left.

- Telephone numbers may only work when calling from the same country.

- Chat options (telephone numbers appear as active links, not plain text) may depend upon cellular connectivity. If a number shows as an active link, click on it to see additional options.

- If chat is not available on the top level support page, try selecting your hardware and narrow down your issue to see if a support article offers a support link offering chat. For example, the contact support link on this page Check your Apple Account balance - Apple Support offers a chat link about emptying account balance even on a computer where the top level page does not offer any chat.

Discuss the entirety of this with Apple, while the battery itself gets replaced.

Battery replacement is USD$99.

Start here: Apple Service and Repair for iPhone Battery - Apple Support

Welcome and thank you for reaching out. 🤗

There appears to be a problem with the internal battery. Only a certified Apple technician can determine the cause and offer a complete solution.

Therefore, I recommend service.

Service Checklist:

• iPhone service pricing.
• Check AppleCare Coverage.
• Get your iPhone ready for service.

Service Appointment:

• Start a Service Request.

Contact Information:

• United States: 1-800-APLCARE.
• Contact Support.

Additional Support:

• iPhone Support.
• iPhone User Guide.
• Check Repair Status.

Good luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer

When a battery is as severeley depleted as yours is, it really doesn't matter what should have been. And Apple never suggested an iPhone battery should be 85% after 1000 cycles. They said it "could" be at 80% after 1000 cycles, but that's not a guarantee, nor is battery health decline linear or constant. There are many factors which contribute to battery health decline. Things like running the battery fully out till it shuts off or routinely using the phone when the battery is below 20% will age a battery faster, regardless of cycles. You've clearly pushed that battery hard so it's no wonder it only lasts an hour. Batteries simply cannot and do not last forever.

You are not eligible for any free replacement. Had your battery declined to 80% in the first 12 months of warranty, it would have been replaced, but you passed that long ago.

If you don't get the battery replaced as soon as possible, you stand the chance the battery may swell, which could permanently damage the phone beyond repair. So not only will you not get any sort of free replacement, but you'll be looking at buying a new iPhone. Also severely depleted and swollen batteries become a fire hazard.

Your choices are to:

1. Immediately schedule a battery replacement at your Apple Store Genius Bar, which you WILL have to pay for or
2. Trade your phone in for a new iPhone.

That's it and you can use this link to schedule a battery replacement at the Apple Store Genius Bar --> Apple Service and Repair for iPhone Battery - Apple Support

lobsterghost1 wrote:

Things like running the battery fully out till it shuts off or routinely using the phone when the battery is below 20% will age a battery faster, regardless of cycles.

Another thing to avoid is to let the iPhone and the battery get too hot, for example in direct sunlight in a car.

FWIW at least my old iFixIt batteries sometimes very fast lost their reported charge but iFixIt hint using the device until it shuts off due to low battery fixed it to previous level:

iPhone battery calibration - Apple Community

That said, I'd NOT do that in my new iPhone 18 Pro until it is old and absolutely necessary so there is nothing to lose.

miastahu21 wrote:

my iPhone 15 plus that I've had since October 2023 is at 51% battery health.

You should have replaced that battery long ago – when battery health first dropped below 80%. By continuing to use the iPhone with such a worn-out battery, you may be at risk of the battery swelling and damaging your phone.

I've seen people here say that it is normal for battery health to go down by 1% to 2% per month, October 2023 is 36 months ago, so if we're talking about an original battery which started out at 100% health, that works out to a decline of about 1.4 percent per month – a very plausible number.

If we assume that 1/3rd of the 49% decline occurred during the first year, while your iPhone was under warranty, that suggests that the iPhone's battery health was around 83% at the end of the 1-year warranty period. That is, battery health dropped to "time to replace" level only after the warranty had expired.

I'm a student so I don't really have the means to spend money on a battery replacement

If you do not replace the battery, and it swells and damages your entire phone – leading to a much more expensive repair bill, or to the need to throw away the phone and buy another one – you may learn the hard way that failing to replace the battery was "penny wise and pound foolish".