iPhone 13 Battery Health Drop

My iphone 13 battery health went from 100% to 99% after 3 months. Since last September 20 when I update to ios 16, my battery health is decreasing. Battery health has decreased by 4% in the last 20 days. Solve this problem?


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Posted on Oct 11, 2022 10:21 AM

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Posted on Jun 9, 2023 7:01 AM

sujayshah wrote:

September end last last year.

iPhone battery capacity drops an average of 1% per month. So it has been 8 months. Thus 93% is about where it should be.


Batteries are consumables; they lose a little capacity every time they are discharged, then recharged. On average this works out to about a 1% loss for every 25 “full charge cycles”. As one example, if you charge the phone overnight, every night (and that is what you should do; it is a best practice), it starts the day at 100%. If it drops to 20% by the end of the day before you charge it again overnight that counts as 0.8 full charge cycles (20% to 100%), or about 24 full charge cycles per month of use. For this example your battery capacity will lose about 1% per month. Of course, if the end-of-day level is higher than 20% the capacity loss will be a little less, and if it is lower than 20%, or you charge it during the day, the capacity loss will be higher.


Once the capacity drops below 80%, or if there is a message in Battery Health that the battery is not meeting peak performance expectations, it’s time to change the battery→iPhone Battery Replacement - Official Apple Support


The absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight, every night. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often. The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support

104 replies

Jun 12, 2023 6:53 AM in response to Kittycat714

Kittycat714 wrote:

But like I don’t want to get to the end of this year and I have to replace the battery like it should at least last a year before I have to replace the battery but I have some weird feeling I might be replacing it at the end of this year I don’t know.

If the battery drops below 80% before the warranty runs out (highly unlikely), Apple will replace it under that warranty.

Aug 22, 2023 3:13 PM in response to Bob Timmons

I’ve had my iPhone 13 mini for around 6 months now and battery health dropped from 98 to 95 in just a week, so after 6 months i’d dropped 5%… I’ve had an iPhone SE (2020) and it dropped to 99% after 1 year and 5 months of heavy usage, basically after 500 charge cycles. iOS 13 and 14 were doing a great job on battery health, but i feel like iOS 16 is the cause of the problem here, because as soon as i updated my SE to iOS 16, is dropped by 6% in 2 months. Does anyone know how to stop this or am I just gonna have to replace the battery sooner than I thought?

Sep 16, 2023 8:05 AM in response to Lawrence Finch

I bought it new at the Apple store. Optimized battery charging is on and clean energy charging is on. I charge every night with Apple’s 5W brick and Type-A cable. I almost never let it under 20%, but it happened sometimes. Never have I let it discharge to 0% and I do a very light use of the phone. For example I’ve had 6 hours of lessons today and kept the phone in airplane mode the whole time. Got out of class with 70% battery. Could it be cuz I have an Apple Watch that’s always connected and always connected to GPS keeping track of bike workouts?

Jan 3, 2024 4:35 PM in response to kamrul420

Something similar happened to me, I had 100% on my iPhone and I had been using it for approximately 4 months, then it went down to 99% and it stayed there for about a week, then it went down to 98, the next day it went down to 97 and today it's at 96. I don't know if it's something bad or not. It is simply updating with the true value of my iPhone. How does the battery behave after this?

Feb 14, 2024 7:04 AM in response to Dogcow-Moof

Dogcow-Moof wrote:

I put my phone on a charger literally any time it's not in my hand and have roughly the same battery health.

I couldn't agree with your post more. I've always done the same. My batteries generally last about two and a half to three years. The only times I pay much attention to the battery health number is when the phone is close to the end of its warranty (just in case) and then only if I notice a decrease in performance.


Batteries are too cheap (compared to the price of a phone) to worry about micromanaging them.


Apr 27, 2024 12:04 AM in response to kamrul420

Went to Apple Store in South Coast Plaza in Costa Mesa here in California, somebody checked my battery and was told it’s ok. They couldn’t check further because I did not have the space-a.k.a I did not subscribe to I cloud.


Now my battery reads 80 percent but got a warning that my battery is low at 10. How can this be? It’s not about the i cloud issue, it’s about the battery draining too fast. Hey Apple, are you even listening?

Apr 29, 2024 12:42 PM in response to HopeEs

HopeEs wrote:

Went to Apple Store in South Coast Plaza in Costa Mesa here in California, somebody checked my battery and was told it’s ok. They couldn’t check further because I did not have the space-a.k.a I did not subscribe to I cloud.

Checking your battery has nothing to do with subscribing to iCloud. However, if you didn't have enough free space on your phone (something that would not be remedied by subscribing to iCloud), that could cause a problem.

Hey Apple, are you even listening?

No, Apple is not listening here. This is a user-to-user forum. Apple's participation here is largely limited to making sure we stick to the rules.

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iPhone 13 Battery Health Drop

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