How iPhone battery cycles are ACTUALLY calculated

A charge cycle is 0% to 100% or any values that add up to 100%. It has nothing to do with “ranges,” so 0-20%, 21% - 40%, 41% to 60%,61% - 93%, 94% - 100% is one charge cycle. You are overthinking this. Just charge the phone overnight, every night, with Optimized Battery Charging enabled and you will get the maximum possible useful life out of your battery.

the_bart123 wrote:

In iPhone battery cycle is calculated every 25% and I am SURE Apple do not lie.

Apple didn't lie but they also didn't say that. You're misreading the article.

For instance, you might use 75% of your battery’s capacity one day, then recharge it fully overnight. If you use 25% the next day, you will have discharged a total of 100%, and the two days will add up to one charge cycle.

What is quoted above is a hypothetical example. We can tell this by the use of phrases such as "For instance" and "you might"..

One could easily and correctly, say, "For instance, you might use 74% of your battery's capacity one day, then fully recharge it overnight. If you use 26% the next day, you will have discharged a total of 100% and the two days will add up to one charge cycle." In both cases, the total is 100% and that's what matters.

the_bart123 wrote:

So to be clear - if I will discharge and charge 20% (for instance from 80% to 60%) EVERY DAY so...... after 5 days I will reach 1 full cycle because iOS counts every single % been charged and discharged?

Yes, that's correct.

How do you know that if Apple do not say that?

Lawrence knows this because he's been working and studying in this field for probably longer than you've been alive. And because, Apple did say that. They said one charge cycle is equal to 100% discharge and charge.

the_bart123 wrote:

Because Apple's example is totally confusing - WHY they used PERFECTLY every 25% ?

Because it makes the math easy.

Especially when they did not say any random charge and discharge adds up to 100% gives 1 cycle

The also didn't say that 51% discharge on one day and 49% on the next add up to 100%. Or that 12% and 88% add up to 100%. The gave one possible example out of many.

I drill that problem as battery replacement is not cheap :(

I have no idea what that means. Could you explain what "drill" means in this context?

I know just about everything about batteries. And you are misinterpreting what you referenced, it does not say the battery cycle is calculated every 25%. It is giving an EXAMPLE, not saying that it is measured every 25%. I gave a different example.

Obviously there's going to be a certain resolution to it (which we're not privy to), but I'm sure it's going to be able to figure out 4 or 5% and then add that to the total like a vehicle odometer. That's basically what it is, just keeping a running total by just adding it.

Thank you, Idris; glad that no one needs me😈

Lawrence Finch wrote:

Thank you, Idris; glad that no one needs me😈

We will alway need you!!!!!!

IdrisSeabright wrote:

....

We will alway need you!!!!!!

+2

Giulio