iPhone 15 battery health dropped in one month of usage

Bxhowell wrote:

This is inaccurate. Please explain how my family purchased 4 iPhones the same day, and I’m the only one with the pro max and it has degraded to 98% after only 50 charging cycles. Meanwhile, everyone else in my family has basic iPhone 15’s and they all show 100% life after 100 charges.

So you have different phones than everyone else in the family. Also, you most like aren't using exactly the same apps in exactly the same places.

2% drop after fifty cycles means you’re phone battery will hit 80% in well under 500 charging cycles. The pro max has a bigger battery and should last longer than the basic iPhone 15. I’m not talking day to day, I’m talking about time intervals between needing to replace the battery

You're assuming that the degradation will be linear. It's not.

I bought an iPhone 15 the day on launch (Friday September 22th) and after 368 cycles it’s at 88% battery capacity I thought these new batteries were supposed to be good for up to 1000 cycles like Apple said this battery is only going to live up to around 545 cycles which is like 45% less then advertised.

Nooo bruh my friend purchased iphone 13 his battery health dropped from 100 to 99 after three and half month i purshased my iphone 15 april 28 2024 now my battery health is 98 after 52 cycles what is this apple ???

Well, your battery is doing better than average so far. Congrats on that.

On average.....you can expect a 1% decline for every 25 charge cycles.

68 divided by 25 = 2.7%, so I would expect your battery to be in the 97-98% range at this time.

Lucky you.

This is perfectly normal, if your other phone only degraded 1% in a year, then there was something wrong with the sensor.

Batteries degrade over time with usage due to chemical aging, that's just how they work.

You can expect about a 1% drop per month with average use on an iPhone. This is an approximation, that is why it may be plus or minus a few percent on a month to month basis.

Apple recommends replacing it when it reaches 80%. To check your battery health, go to Settings > Battery > Battery Health.

iPhone Battery Replacement.

iPhone Battery Repair & Replacement - Apple Support

About Lithium Ion Batteries

iPhone battery and performance - Apple Support (IN)

Here are some tips on maximizing battery life.

Batteries - Maximizing Performance - Apple

hi nishanth, calculate battery health from the month of purchase and usage. measuring battery health 5 to 6 months once will help us understand how the reduce is happening. Follow the suggested charging practice and it helps to maintain it overall to reach 2.5 years overall lifetime to reach 100 to 80%.

1. Charging Practice - Avoid draining the battery frequently. If it happens rarely, not an issue. But don't drain it frequently as it could affect battery health.
2. Cable and Adpater - Use original charging cable or mfi certified cable if its lightning cable. If its USB C, then use original or any branded cable. that will help.

That is all I do to maintain my iPhone battery health. Answered Why is my iPhone battery health reduced? here.

I bought 28 December 2023 and now 57 cycle and 96% Battery Health....

I Dont know what is my fault.....but day by day it is dropping

Mine also. Just after 9 month of use. 360 Cycles. 88% remaining.

My iPhone 15 with 68 charge cycles has reached battery health 99% and I got it on May 1.

I use 80% limit and always charge it in a cool environment and never do over night charging.

same here. 10% drop in Battery health in 8 months is massive. At the same time, my iPhone 14 dropped just 2% to the same usage. There is something wrong with the iPhone 15 Pro chip or battery. It has heating issues and the battery health drain is massive.

My iPhone 15 Pro Max is down to 95% I also bought the phone in Oct 2023 is now July 2024 9 months down battery health is down 5%

AppleLove100 wrote:

My iPhone 15 Pro Max is down to 95% I also bought the phone in Oct 2023 is now July 2024 9 months down battery health is down 5%

Sounds very normal.

Georgianaaa wrote:

Hi! I have an iPhone 15 for almost 5 months (Bought on December 10) and my battery health dropped at 97%. I m so worried because I don’t think it’s normal to drain like that when I have my 80% limit too and rarely charged at 90-100% (happened 4-5 times at the begging). I charge my phone when is 18-19% and I have 172 cycle count. If there is someone to help me with advice, thanks!

What you're seeing is normal.

You can charge your phone whenever you want. There is no need to wait to some arbitrary percentage.

This is inaccurate. Please explain how my family purchased 4 iPhones the same day, and I’m the only one with the pro max and it has degraded to 98% after only 50 charging cycles. Meanwhile, everyone else in my family has basic iPhone 15’s and they all show 100% life after 100 charges.

what that tells me is that the base iPhone 15 has a much better battery.

according to apple, the iPhone 15s are supposed to last a full 1000 charge cycles, and that is based on degradation to 80% battery life.

do the math and you’ll find that a 2% drop after fifty cycles means you’re phone battery will hit 80% in well under 500 charging cycles. The pro max has a bigger battery and should last longer than the basic iPhone 15. I’m not talking day to day, I’m talking about time intervals between needing to replace the battery

jenish18 wrote:

Nooo bruh my friend purchased iphone 13 his battery health dropped from 100 to 99 after three and half month i purshased my iphone 15 april 28 2024 now my battery health is 98 after 52 cycles what is this apple ???

Do I need to point out that an iPhone 13 and an iPhone 15 are different devices with different chips?