Maximum Capacity is at 98% in less than 2 months on iPhone 16 Pro

Remember that Apple always rounds down any "tenths" in the Maximum Capacity display to the nearest whole number.

For example.....98.9% will display as 98%, even though the battery is only one tenth below 99%.

So the battery display may have dropped from 100% to 98.9%, a drop of only 1.1%, but this will look as if the battery dropped 2% from 100% to 98%. Significant difference there.

It's just way too early at this point to try to estimate how long your battery might go.

At a cycle count of 200, chances are the battery will be at about 92%. At 375 cycles, the battery will in the 85% range.

If the battery is really defective, and drops below 80% in the first year, Apple will replace the battery at no charge.

This is not an answer to your original question.  I have noticed your use of your phone has an unusual Activity being used in one particular App.  The ‘’Home and Locked screen” App;  Has an extraordinary amount of use.

I use my IPhone 16 PMax for a few hour a day.  And my Locked Screen use is a few minutes.  Maybe an average of 4-5% per day.  Yours is over 2 hours use when the phone is locked.   I am not an expert.  But, you might have some settings that might be helpful to reduce this particular issue,  And possibly the amount of “Dynamic Island" features, Live Activities that are active when your phone is locked.

The issue is lithium ion batteries do not decline in a pure linear fashion. It’s entirely possible it’ll decline just 1% in the next 100 cycles.

Apple will run diagnostics and if nothing is showing as defective, I doubt they’ll do anything. The 4% decline is unusual, but I don’t believe is indicative of a defect. But in any event, diagnostics is the next step.

iPhone 16 pro, battery health 100% with 86 cycles in about 4 months and a half of use. Always charge to maximum 90% and try to charge before dropping 20% and almost always use a slow charger (5W) which can take about two hours to full charge yes but is much better in controlling temperature of the phone while charging and so preserves battery life significantly over time. Only use a fast charger (20W) when for example I have to go somewhere and my battery is low, then I just plug it for about half an hour on the fast charger and that’s more than enough to make my battery last when I’m outside. Some extra tips I use are, turning off unnecessary location services (both on apps and system services), using most of the time reduce white point which improves battery life by slightly dimming the screen, using notifications summary for most apps except messages or social media for example, turning off mail fetch and those battery drainers features on the default mail app as I use the Gmail app and finally turning off background app refresh for most apps except maybe those you use the most.

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if you have a moderate use then set your phone’s charge limit between 80%-90%. I got my phone in Dec’24 I have done that and as on today in Aug’25 (after 8 months of use) my battery’s max capacity is 99%.

The reason it works is, Li-ion batteries charge easily & fast upto 80%, after that each %further the battery is charged, the li-ion cells have to work much harder to charge themselves up. As a result your battery’s life declines faster.

It’s optimal to keep lithium batteries at 20%-80% and never letting it die. What I do is charge my phone to the mid 70’s at night, then put it on airplane mode and I don’t charge it over night, been doing this for well over a month since I’ve gotten my 16 and battery is still 100%

Battery life, how long an iPhone lasts on a single charge and is what I see mostly being complained about here, is a different issue from battery health. As has been said already, the iPhone 16 is far too new to have any data on how fast the battery will degrade, though I don't expect it to be significantly different from previous models of iPhone.

As to how long your battery lasts on a charge, there are some tips here:

If the battery in your iPhone drains too quickly - Apple Support

Regards.

After doing some additional research, my opinion is that this is not normal for an iPhone 15 battery, which Apple claims will go up to 1,000 cycles before it reaches a Maximum Capacity of 80%.

"Batteries of iPhone 15 models are designed to retain 80 percent of their original capacity at 1000 complete charge cycles under ideal conditions.*"

iPhone battery and performance - Apple Support

That would translate to a 1% decline for every 50 charge cycles. We've been making the mistake of assuming that the old guidelines........a 1% decline for every 25 charge cycles.....applies to the iPhone 15 (and iPhone 16).

The wild card here is that Apple also states......(in the hard to find footnotes).....That these numbers are based on "ideal" conditions, so the easy way to explain that the battery is declining at a rate faster than the claims would be to state that the iPhone must not be operating under "ideal conditions".....whatever they are. I can't find anything that details or defines "ideal conditions".

Batteries, like people are individuals. No two people age exactly the same and batteries don’t age the same either. The exact usage, chemical makeup, storage conditions, exposure to heat and cold and about a dozen other factors mean that every battery ages differently. Battery aging is not a linear (straight line) and degrades at different rates as the chemicals in the battery age and other factors mentioned above. Apple expects your battery health to be at 80% after 24 months. If your battery health misses that expectation, contact Apple Support.

Please review the Apple Support articles on battery optimization. It contains the best current practices for battery charging.

iPhone Battery and Performance - Apple Support

Batteries - Maximizing Performance - Apple

About the battery and performance of iPhone 11 and later - Apple Support

Several users.....including me.....have posted to this thread to say the your battery performance is normal. I made the mistake of assuming that the iPhone 15 and 16 batteries were similar to previous models, but have done some additional research, which I just posted a few minutes ago.

Your battery performance is not normal. My opinion.

The good news is that you should get a free replacement battery since it is nowhere close to meeting the claims by Apple. The bad news is that Apple will likely tell you that the Maximum Capacity has to be down to 80% before they will replace it.

Based on the above report, it can be inferred that an additional 280 charge cycles will be required to lose another 16% of the battery’s maximum charge capacity. This means the iPhone 16 Pro battery will reach 80% capacity after 350 charge cycles (around May 2026).

Lithium ion doesn’t age in a linear fashion, it may hold at 90% for 6 months. This is well documented use issue with lithium ion batteries. Below are 4 different charge voltages and look how the batteries aged. Only 1 out of three aged linearly and this was under laboratory conditions so in real world would be hard to duplicate.

My 16 Pro's battery is only over provisioned by about 1.6%. A surprisingly small ammount. Usually manufacturers place a 5% over provision in the batteries so that even when you buy a phone that's been sitting on a shelf for six months. It'll still have the full rated capacity This reply is not looking for advice or feedback . I am simply adding information.

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