Battery Health Capacity Dropped

There's a normal range of capacity when new, although it seems to be within a fairly narrow range. I know some of my AA batteries say that capacity is 2000 mAh nominal but 1900 mAh minimum when new. Some batteries could be lower than the nominal rating and then that seems like a 3% jump quickly when the battery health (which is relative to the nominal rating) catches up.

The smart battery system keeps all sorts of stats, but also that's where the battery health is stored. Obviously it's set to 100% when new, but it has to be reevaluated. I've even heard of it going above 100%.

My battery is at 100%. Phone is Dec 19.

Simple as, the more you keep the battery in the upper levels, say 100% to 80% charge and you keep it topped up, your battery will have minimal cycle and wear and tear.

The more you cycle the battery, full to empty, the more it wears.

Its all in the battery science.

And obviously Apple has a very sensitive battery monitor.

Even having battery at 75% doesn’t mean your battery is dead, just that its capacity is reduced and still fully functional.

Dont get your knickers in a twist of a few lost percents. Its a wear and tear item after all!

SriIphone11 wrote:

can some one suggest how to maintain the battery leveel

You can't stop battery capacity from declining any more than you can stop getting a year older on your next birthday. Batteries are consumable. Battery health will continue to decline. When it drops below 80%, it will need to be replaced.

Battery health does not change in a linear fashion. But if you are not having any other problem than the battery health percentage dropping save yourself some worry and don't check it again until one month before the warranty ends. Then if it is at 80% or below use your warranty to get it replaced.

You’re battery health isn’t going to restore by doing a factory reset, I’m at 98% health and it will drop more over time. . The battery percentage isn’t an issue. If you can’t make it through an entire day without charging it with normal use then I would say contact Apple.

Assuming that you’ve had the phone since September, 97% after 6 months is not unheard of.

ukdolfan wrote:

Appreciate what you say, but by definition it’s bloody ridiculous that they use a battery that doesn’t work effectively between 1% and 100% and that you should only use 60% of the battery’s range....

Nobody is suggesting that Apple is doing anything that requires a 20-80% battery range. This is just a rule of thumb that limiting the battery range to the middle will exponentially increase the life of the battery. To some degree what a device maker sets at 0% and 100% is chosen. Most lithium-ion batteries could be charged more than 100% and can be used less than 0% if the power management system would use it. In one way, reducing the range is why there is greater battery longevity.

Apple makes zero suggestions about limiting the range of the battery. To them anything from 0% to 100% is fine - just make sure that it's recharged if it ever gets down to 0%. But there is solid evidence that limiting the charge range used can increase battery longevity. I noted how this is done by choosing the 0%/100% points. Some device manufacturers have a way to program this, which makes it a lot easier than trying to manually do it. Lenovo calls their notebook computer setting "maximum lifespan" where they have a slider that can choose between that and "maximum runtime". Tesla cars can supposedly average longer battery life if the user chooses a setting that will cap the maximum charge level. Apple has never had that kind of programmability for their power management system.

I have the 11 Pro Max, 98% at 6 months and I use it for personal and work purposes so it is heavily used. There is no guarantee that a factory reset will have any impact on what you see your health percentage at and there isn't much you can do with it other than take it to Apple and ask them to run diagnostics on your device to verify the battery isn't defective. There is an algorithm built into the OS that regulates the percentage and battery health, if that isn't reading correctly then that would also cause issues with the battery health showing to be lower than it really is. It's a mess of a configuration on the back end and they didn't do a terribly awesome job at executing the idea.

It won't be a constant drop, mine dropped a lot in the first few months, then has stayed the same and has gone back up.

They have said the battery management isn't 100% accurate. So is used for a guide.

But past iPhone models didn't have this function, it's fairly new.

There is nothing wrong with the figures you have said.

Hi pal! Since my iPohne 11 Pro still has a 100% battery health since I bought the phone in October. I am confident to tell you that I have the best tips for preserving battery health. The first thing you need to do is to avoid hot temperatures, that is the feeling on the back of your phone. So when you charge, don’t put the case on or you can even apply some water droplets to the back. The second tip is to keep the charge between 20-80. This will also protect your battery from decaying! The last tip is to avoid extremely intense use! Hope these tips help you!

I bought mine in November last year & my battery health is 97%. Based on what I learn from several articles regarding battery life, it depends on :

1. How you use it either mild or extensive.
2. The apps that you install since some of it is going to drain your battery. (Vampiric apps)
3. The environment that you usually at when using your iPhone since the suitable temperature is between 32º to 95º F.
4. If you use a wireless charger, you will notice that your phone can get a little hotter than if using a cable (Number 3 info) This one It makes some sense.

As a comparison, I bought an iPhone 6 in 2014 & using it for five years! After five years, battery health has dropped to 80%, which I consider almost excellent.

It is normal. Every battery is different and will drain. Did you expect it stay 100% for ever. It won’t.

Loosing 1% after 2 months is pretty good.

You can’t compare your phone battery to your friends as phones and batteries are different and how users use them is different.

99% is perfectly fine so what Apple told you is correct

tineesha32 wrote:

Im having an Iphone 11. after just 5 months it dropped to 98%. I have no idea what went wrong and this bothers me alot.

Nothing is wrong. Your phone is fine. Stop worrying about it.

Unless your phone is not working properly or you're nearing the end of your warranty, there is no reason to even check battery health.

Yeah I wonder why some batteries degrade so exceptionally quickly. The two factors accelerating aging for any battery are high temps and high state of charge. Say you leave your phone connected to a charger exposed to full sunlight in summer - then you could definitely see the battery go in a couple of months. So to me the question is whether there are just some unfortunate customers who got bad batteries or if this is due to the environmental and state of charge related history.

I'm continuing with my optimized charging schedule. Now close to 2 months after purchase I'm still getting readings above 105% (105.2% just now). With an average of maybe a tad below 105%. But it's winter here.

IdrisSeabright wrote:

Yes, your phone is perfectly okay. Batteries are consumables. As long as it's over 80%, it is fit for use.

That's like saying "oh you got clogged arteries and a couple of cancers at 30 - that's totally normal, as long as you don't die before 70 there's nothing to worry about". Just as human health is very much influenced by the choices we make so lithium ion battery health reflects how we use and charge our phones.

This is what my iPhone 12 pro max battery health looks like after 2 months of use and 52 charge cycles:

The most important thing: keep the time spent at high state of charge as short as possible, especially when operating at high temperatures.

Charge it like this and the battery will last (almost) forever:

What hurts is having the phone sit at high charge levels. Going to 0% is comparatively benign. The lower the charge level you can get away with the better. Operating between 0% and 60% is like 10x better than between 40% and 100%.