iPhone 13 Battery Health Drop

funsutton1 wrote:

I have had my iphone roughly one year and the battery health just now dropped to 99%. It's because I never keep charging the phone when it has reached 100%.

I set an alert on my phone when it reaches 100% and disconnect it immediately. I never charge it overnight and let it sit on the charger when fully charged.

Totally unnecessary. The phone itself has a charge monitoring chip in it, and stops charging at 100%. And it’s actually BETTER for the battery to leave it in after it stops charging, because that way the power to run the phone comes from the external power source rather than the battery.

Either you were just lucky that your battery exceeded the minimum capacity specification and started out life over 100% (probably around 110-115%), you use the phone very little, or your battery gauge is broken. If you have a Mac the app Coconut Battery can tell you details about the original battery capacity, the number of charge cycles, and the current state of the battery.

My iPhone XR is still showing Maximum capacity of 95%. It dropped to 95% after three months of use and has been “stuck” there for over 3-1/2 years.

I personally don’t think that can possibly accurate, but what do I know. I’m not a heavy user so I don’t pay that much attention to that number, but I would think it lose some capacity even if it was turned off and put into a drawer and tucked away simply because it is closing in on being 4 years old.

That’s about right. And 99%, if it just changed, means 99.9% because the gauge does not round, it just drops the tenths.

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

You should contact Apple for help if your phone is getting hot. You may have a hardware issue. You can start here.

Contact - Official Apple Support

Yes, I have. It's simple, typically done while you wait and comes with a one year warranty.

No, you just have been lucky with your battery chemistry to date.

sujayshah wrote:

In last 2 months my battery health went from 100 to 93. It went from 95 to 94 in a week and then 94 to 93 in 2 days. We are being told that until its above 80% its fine. But the problem is that the rate at which it is declining, it won’t even be a year and it will be below 80%. That too when background refresh and notification are off for majority of apps, don’t play any games on it and also don’t have any social media except for whatsapp and linkedin. The most I do with the phone is spotify.

When was the phone purchased new?

The battery health percentage on your iPhone is a measure of the battery capacity relative to when it was new. It’s normal for this to slowly decrease over time. However, if you’re noticing a rapid drop, it might be due to the way you’re using or charging your device, or it could potentially be a software issue.

Here are some general tips to maintain your battery health:

1. Update to the latest software: Always make sure your device is running the latest version of iOS. Future updates may offer further improvements.

2. Optimize your settings: Some features can affect battery life. You might want to turn off dynamic wallpapers and motion effects, reduce screen brightness, or use Wi-Fi instead of cellular data.

3. Avoid extreme ambient temperatures: Your device is designed to perform well in a wide range of ambient temperatures. Exposure to extreme temperatures can affect battery health over time.

4. Understand battery usage: In Settings > Battery, you can check which apps are consuming most of your battery power.

5. Enable Optimized Battery Charging: Go to Settings > Battery > Battery Health and turn on Optimized Battery Charging. This feature learns your daily charging patterns and can slow down battery aging.

If the battery health continues to decrease rapidly after trying these tips, it might be worth reaching out to Apple Support. They can run a remote diagnostic on your battery and see if there might be a hardware issue.

I have an iPhone 13 I got on December 5, 2022 The battery health says 97%. I hope that’s normal. It was just a month ago that the battery health said 98% within the last month. It went from 98% to 97% the battery health is that normal. I understand the battery health is gonna go down for within a month it went from 98% to 97. I’ve only had the iPhone 13 brand new since December 5, 2022. I don’t think I was expecting before summer to already have the battery health be 97%. And I get it people are telling me. Oh it’s healthy. It’s fine but like I have this weird feeling that I won’t even have a phone a year like by December 2023 I wouldn’t be surprised if it gets down to like in the 80s. But within a month, it shouldn’t have gone down that much but I don’t know.

An average iPhone that is 6 months old, as yours is, would be at 94%. So your phone’s battery performance is better than average.

Also, note that the displayed value does not include fractions, so when it goes from 98% to 97% it has actually gone from 98.0% to 97.9%. It has not dropped a full percent.

Read my post right above yours for more detailed information.

Well, I’ve had my iPhone 13 since December 2022 and its battery health is already at 97%. And just last month it was at 98. And today I looked and the battery health says 97%. I guess I wasn’t expecting before summer because we’re not at summer yet that it would already be at 97% the battery health I don’t know if that’s a good thing or not I came from an iPhone eight that had really bad battery. That’s why I got the iPhone 13 because my iPhone eight was at 80% battery health and would last maybe two hours on a good day I could maybe get 3 to 4 hours out of it. It was usually anywhere from 2 to 3 hours. It just didn’t last very long. My iPhone 8 I felt like I was charging it way too much. So then I got the iPhone 13 and December. Well I was expecting way later on mid 2023 before it ever got to where it is. So I’m hoping that there’s nothing wrong with my battery on my iPhone 13 because as I mentioned it was Botton December and it’s already at 97% battery for health and it’s only been at 98% battery health for a month before it went down to 97. I don’t know what I’m doing wrong. An apple just said oh well it’s still in the 90s so it’s still good battery health. 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.

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.

I purchase my iPhone 13 Pro in June 2022. Today, after more than 1 year it’s battery health has just dropped to 98%.

I rarely charge it above 80% with the help of an App called Battery Alarm. I also have charging optimised and various settings adjusted to save battery life like Push emails and Background App refresh switched off

Rechargeable batteries do not like charging above 80/90%, it kills their lifespan.

The biggest error most people make is charging overnight.

My phone cost me £1000. Why would I intentionally damage it?

I also drive an EV and follow exactly the same principles.

We charge our phones overnight, every night to 100%. My 14 Pro is currently at 100% capacity after 9 months. My 4 year old XR is at 94% after 4 years. My wife’s 8 is 6 years old. Its battery is 98%. So perhaps your information about what batteries “like” is misguided.

Actually, the Best Practice is to charge overnight, every night, with Optimized Charging enabled and automatic backups also enabled. As Apple recommends.

My granddad used to say It ain’t what you don’t know that hurts you, it is what you know that ain’t so.

You are missing one factor: Whether the phone runs on battery 100% of the time, or uses external power some of the time, which reduces the number of charge-discharge cycles. When you charge overnight, 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.

The 100% factor is the battery should not be kept at 100%, not that it should never be charged to 100%. Follow Apple’s guidance to charge overnight with optimized charging enabled it will only be at 100% for a short time, as it will start discharging as soon as you discount it.

There is a fundamental difference between an EV car and an iPhone; you can use an iPhone while it is plugged it, and it can use external power rather than the battery. You can’t use your Tesla when it is plugged in unless you have a VERY long extension cord.