[Battery]-About Meaning of Cycle and the Way of Charging

Dear Apple support team/Experienced users,


I have a macbook pro 13" version Middle 2012 a question about the meaning of cycle term of battery in macbook pro.

After reading manual and refer to information on the internet, here is my understanding about cycle term.


* After using all the power of battery, then charging fully, it is a cycle.

* Cycle also means:

1/ Firstly, battery level is 100%. (On Monday)

2/ Secondly, use battery to the level 50%. (On Monday)

3/ Thirdly, recharge macbook pro to the level 100%. (On Monday)

4/ Do from step 1 to step 3 for the next day. (On Tuesday)

After receving level 100% on this day(On Tuesday) , we made one cycle.


The more cycle we can do, the worse battery life we can get.

So i have a question related to the way of charging and creating cycle.

Example:

1/ On Monday, i have battery level at 100% (From the first day of current month)

2/ Then i use to battery level 50%

3/ After that i charge the battery to level 98% (not up to 100%)

4/ Do from step 2 to step 3 until the end of current month.

5/ On the first day of next month, i use all power of battery. Then i let my macbook pro sleep up to 5 hours.

After that i do fully charge for macbook pro.

At this time, i made a cycle for my battery.


Would you please give me your idea about the way of understanding about the cycle i had up to now?

I am looking forward to seeing your replies as soon as possible.

Once again, thanks for your reviewing my question, dear sirs/madams.


Best regards,

Newbietomac84

MacBook Pro, OS X Mountain Lion (10.8.2)

Posted on Feb 11, 2013 5:15 PM

Reply
31 replies

Feb 11, 2013 7:57 PM in response to Csound1

Csound1 wrote:


newbietomac84 wrote:


You are charged to 100% only when the battery is fully charged, if you discharge it to 50% and then recharge to 100% that is half a cycle, do it twice and it is one cycle.


So you means that until battery level reach to 100%, if its charged level is between 50% and 100%, and keep that status day by day, the cycle count will not increase.

If my thought is not correct, would you please give me more advices, dear sir.


Once again, thank you for your replying.

No, the process is cumulative. You are way overthinking this.


When you can plug it in, do so. When you can't, well you can't.


The only thing to avoid is discharging near to zero, when possible recharge before it gets under 20%, preferably 40%


Because you say the process is cumulative, so when will it reach to the point which annouces that 1 cycle is accomplished, dear sir?


Besides that, some link in discussion.apple.com said that we should keep battery level between 100% and 50%.

And your answer suggest that it is better to keep charging from 40% to 100%.

I am confusing dear sir ... What is the minimum level we should charge for a better battery life?

I am a newbie in MAC and i really want to learn how to keep battery a better life correctly, because i read informations from Apple website, i have many questions about the cycle, what is the cycle? We have many case in the way of charging. So in my case, will the cycle be increase or not?


I really need the answer to know clearly about the cycle and way of charging effectively.

Because in the future, if someone use Macbook pro and ask me, at that time i can believe that my saying is best for him to keep a better life for battery, same as i am asking you and your answer will be the best for my question, dear sir.


Once again, thanks for your reply dear sir.

Feb 11, 2013 7:57 PM in response to newbietomac84

newbietomac84 wrote:


Csound1 wrote:


newbietomac84 wrote:


You are charged to 100% only when the battery is fully charged, if you discharge it to 50% and then recharge to 100% that is half a cycle, do it twice and it is one cycle.


So you means that until battery level reach to 100%, if its charged level is between 50% and 100%, and keep that status day by day, the cycle count will not increase.

If my thought is not correct, would you please give me more advices, dear sir.


Once again, thank you for your replying.

No, the process is cumulative. You are way overthinking this.


When you can plug it in, do so. When you can't, well you can't.


The only thing to avoid is discharging near to zero, when possible recharge before it gets under 20%, preferably 40%


Because you say the process is cumulative, so when will it reach to the point which annouces that 1 cycle is accomplished, dear sir?


Besides that, some link in discussion.apple.com said that we should keep battery level between 100% and 50%.

And your answer suggest that it is better to keep charging from 40% to 100%.

I am confusing dear sir ... What is the minimum level we should charge for a better battery life?

I am a newbie in MAC and i really want to learn how to keep battery a better life correctly, because i read informations from Apple website, i have many questions about the cycle, what is the cycle? We have many case in the way of charging. So in my case, will the cycle be increase or not?


I really need the answer to know clearly about the cycle and way of charging effectively.

Because in the future, if someone use Macbook pro and ask me, at that time i can believe that my saying is best for him to keep a better life, same as i am asking you and your answer will be the best for my question, dear sir.


Once again, thanks for your reply dear sir.

Like I said you are over thinking the problem, don't let it go flat, other than that plug it in when you can.

Feb 11, 2013 8:19 PM in response to stedman1

stedman1 wrote:


The only way to not increase the cycle count is to put the computer back in the box and leave it there. You are really, really, really over-thinking this. If you are near an AC outlet, plug it in. If you need portability, unplug it.


Dear sir,


Would you please answer my question at first post?

(Until this time, just only from Mr.Csound1 with the answer "100% to 0% to 100% charge is one cycle, whether it is all in one session or several smaller ones."

or "You are charged to 100% only when the battery is fully charged, if you discharge it to 50% and then recharge to 100% that is half a cycle, do it twice and it is one cycle."

or from Mr.Network 23 with his answer give me more information to keep battery a better life)


For example: Is my thought correct or not?

If not, would you please tell me the reason why?

If is correct, would you please give me another suggestion to make battery a better life or more information about the cycle (the cycle count is increase after fully charging or cumulate to level 100% when we charge time by time)?


I just only want to ask about the experience of using battery, to have a true vision of keeping battery a bettery life.

Some answers like "you over-thinking this" is truly not help me more, dear sir.


Once again, thank you for your reply, dear sir.

Feb 11, 2013 8:32 PM in response to newbietomac84

newbietomac84 wrote:


stedman1 wrote:


The only way to not increase the cycle count is to put the computer back in the box and leave it there. You are really, really, really over-thinking this. If you are near an AC outlet, plug it in. If you need portability, unplug it.


Dear sir,


Would you please answer my question at first post?

Forget the numbers,


Here are the rules, most important first.


1. Don't discharge it to zero

2. Do plug it in whenever you can.

Feb 11, 2013 8:46 PM in response to stedman1

stedman1 wrote:


OK. 100% - 90% - 100% do this 10 times you will accumulate 1 cycle

. 100% - 80% - 100% do this 5 times you will accumulate 1 cycle

100% - 75% - 100% do this 4 times you will accumulate 1 cycle

100% - 50% - 100% do this 2 times you will accumulate 1 cycle

100% - 0% - 100% do this 1 time you will accumulate 1 cycle


Dear sir,


Thanks for your reply.

Your reply is same as my thought, which i posted right before Mr.CSound1's saying, if you have ever read before.

"

Dear sir,


Thank you for reply.

When i read your reply, i can figure out one situation as below:

Example: (We are having 100% battery firstly)

1/ On Monday morning, i use battery to level 50%.

2/ On Monday afternoon, i charge battery to level 80% and use to 50%. (Charged 30%)

3/ On Monday evening, i charge battery to level 90% and use to 50%. (Charged 40%)

4/ On Tuesday morning, i charge battery to level 80%.(Charged 30%).


So at this time, i totally charged 100% althought i did not fully charge to the number 100%.

Is my understanding about your saying correct, dear sir?

I am looking forward to seeing your reply as soon as possible.

Besides that, if anyone else realize that my thought is not good, please give me your idea.

"

Because your example is just only the constant cases, for example:

from 100% to 90% : ten times, each time:10% => 10x10%= 100%.

but in my case: we have inconstant cases, because we work daily, someday we finish our task soon, someday we work too late. So it is difficult for us if we often keep continue taking care of constant case like those.


Finally, the conclusion about the cycle count is The application of battery management will take care of how many percentage we charge on it. If total of charged percentage is reach to 100%, at that time, the cycle count will increase by 1?


If you agree with this idea, would you please say YES?

If you do not agree with this idea, would you please give me a reason.


I think all my question and all your answers (Mr.CSound1, Mr.Network 23, Mr.steadman1, Ralph Landry1, ...) are giving me the true answer about the cycle issue, which is existing in my mind.


Once again, thanks for your reply, dear sir.

Feb 11, 2013 9:00 PM in response to stedman1

stedman1 wrote:


Good luck with your MacBook Pro, I'm done here.


Sorry if i make you angry sir, i just want to check my knowledge about the cycle term and the way of increasing cycle count to know more about the important of cycle in battery life. Beside that i want to learn more experiences from those people like yours, who used MAC for a long time up to now.


Once again, thank you so much, dear Mr.Stedman.

Feb 11, 2013 9:32 PM in response to DasProGeek

DasProGeek wrote:


Let's make this simple.


It doesn't matter if the battery EVER reaches a full 100% charge.


90% -> 40% -> 70% (0.3 charge cycles, because you charged by 30%)

70% -> 10% -> 90% (1.1 charge cycles, because you charged by 80%, adding 0.8 to the previous 0.3, which equals 1.1.)


This is a very simple thing that you are massively overcomplicating.


If Mr.DasProGeek review my posts before, i have already described my example same as yours before, but i did not receive some answer like yours, so that is the reason why i keep continue asking to receive the right answer for issue i am having.


I think that my question useful for other people like me, who are newbie in using MAC, because they will also have the same questions like mine.


Besides that, i want to say thank you to you all, although maybe my answer make some of you angry at me.

Actually, my characteristic is i often want to learn and recheck my knowledge about some issue i am thinking, to sure that my knowledge about that is correct.


If someday in the future, several customers or newbies same as me ask you some questions like that, would you please do not say "you are over complicating", because they just only ask you, big pros, who having best experiences in using MAC or having solid knowledge about informations related to MAC, some issue that is not clearly until they can understand. I think you can encourage them by giving more information, not by our emotion or our consideration about themselves, because it is true that they just only want to get information about the issue....


I want to say thank to djcastaldo, Shootist007, ralph landry1, csound 1, network 23, stedman1 and DasProGeek. Athought the useful information I got comes from Network 23, CSound 1 with the answers "100% to 0% to 100% charge ...", "You are charged to 100% ...", stedman1 with the answer "100% - 90% - ..." and DasProGeek with answer "90% -> 40%...", because those answers gave me more information than others, which i can read easily from Apple website and other sites in battery management (not definitely same as word by word, but in meaning, i mean that).


Once again, thank you for your answers, dear sirs.


Best regards,

Newbietomac


Note: If somebody else have more ideas about the way of keeping batter or charging battery for a better life, please give me your advices about these.

Feb 12, 2013 12:02 AM in response to Network 23

Dear sir,


Thanks to the link: Battery University at another link you posted, i have more knowledge about the way of charging Lithium-ion battery. With Lithium-ion, we should not charge fully.

But when i think about Lithium-ion, especially in Macbook pro battery case, what is the idea minimum level and maximum level of charging lithium-ion battery?

I am using minimum level of charging at 50%, but this number I have just gotten from the answer which already posted in disscussion board of Apple.

And Mr.Csound1 also wrote that i can plug-in to charge whenever i want, but not discharge at level 0. He also suggest that 40% is the idea level I can charge.

So how about your suggestion dear sir...


Best regards,

NewbietoMac

Note: I also want to click ThisSolveMyQuestion for Mr.DasProGeek and Helpful Answers for Mr.CSound1 and Mr.Stedman1 but this discussions board just only support for two helpful answers and 1 This sovled my question so i could not click those for you all. Once again, thanks for you help dear sirs.

Feb 12, 2013 1:09 AM in response to newbietomac84

I don't think it's a good use of time to find an "ideal" charging level. I think it is better to think of preferred ranges, based on the information that we have.


Because lithium-ion prefers shallow discharges, I would suggest that minimum charging levels above 50% are generally better, and also the farther down you go the less ideal it is. However, I would certainly not worry about going down to 10-20% once in a while, or even once a week. Because if Apple gave me a battery with up to 7 hours runtime, there are times when I want or need as much battery runtime as I can get, and that's OK...as long as it's not every day.


Maximum level for me is anywhere near 100%, because I want as much battery power available if I cannot plug in for a while. The only time I will drop the battery under 100% is if the battery is hot (like in summer) because the information says that a battery's lifetime is shortened if it is full and hot.


Other than that, it is not worth the time to worry too much. If you charge half a cycle (50%) every day, it will take almost 6 years for the battery to reach its 1000-cycle rating. By then, you will probably have gotten a different computer already. In other words, overall obsolescence may cause you problems sooner than short battery life.


After 146 cycles, my battery is at 97% health.


Also, on the cycle discussion, all of these = 1 cycle:

40% + 60%

30% + 30%+ 20% +20%

1% x 100 charges

You get the idea.

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[Battery]-About Meaning of Cycle and the Way of Charging

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