Charge Cycles?

My wife has a Macbook Air Rev B.. The battery works fine, but the wifi and time/date is no longer retained after a reboot. Apple Genius says it's the battery, and said it would cost $129+tax to replace since it's over the 300 fully cycle count (have applecare). Somehow, I thought the MBA Rev B battery was spec'd to 750 cycles (she's at 400). I see people in previous threads point to an Apple link with a quote from it stating the 750 cycles, but the link now points and references the new Rev D 1000 cycles.
I'm thinking the Genius just said 300 out of the blue, but would like to find some documentation that says outherwise. Maybe go to another Genius?

Thanks drsailer... That is unfortunate.. What's even more unfortunate is that the battery still says normal, and still runs for over 3 hours.. The only issue is when my wife reboots the OS, she loses time/date and wifi password.
I guess it's up to her to decide whether she wants to replace the battery or buy something new.

Similar Messages

What is the max charge cycle?

What is the max charge cycle?
If it reach the max, will apple replace it under warrenty? or it not covered, and I have to buy new battery?
Like when you go to System Pref > About this mac > Power > Recharge Cycle.
It will tell you the amount of charged you made. What is the max you can recharge?

A properly maintained Apple notebook battery is designed to retain up to 80% of its original capacity after 300 full charge and discharge cycles. See http://www.apple.com/batteries for lots of good info on Apple batteries.

HT1490 After how many charging cycles do I need to replace the baterie

After how many charging cycles do I need to replace the baterie

Please see below my system overview
MacBook Pro
13-inch, Mid 2010
Processor 2.4 GHz Intel Core 2 Duo
Memory 4 GB 1067 MHz DDR3
Graphics NVIDIA GeForce 320M 256 MB
Serial Number 730504Z5ATM
Software Mac OS X Lion 10.7.3 (11D50b)

Can someone explain this chart about Li-ion charge cycles to me

I consider myself a pretty smart guy, but i couldn't figure this out. I'm thinking that apple just provided this graph without any real explanation of what it means. I'm talking about the one on .. http://www.apple.com/batteries/ that has a caption starting with "Charge Cycle." They provide a general explanation of cycles below, but don't seem to address the same thing the illustration they provided does. What does the 40% 20% 30% 20% 50% 60% mean? Why is "1 Cycle" in the middle and what is the difference between cycle 0-1 and 1-2. basically that illustration makes no sense to me and i'd love for someone to explain it

That charge is telling you how the charger charges the battery. The voltage charge is the green line and the amperage is the orange line. Voltage goes up to its full extent in the first couple of hours. The amperage starts at full charge strength and goes down as the batery charges so it will not overheat the battery. The most important thing to know about charging a Li (Lithium-ion) battery is that it has two different charge times, quick and full. most Li batteries get about an 80% charge at the quick charge time and 100% charge at the full charge time. when you first charge any rechargable battery make sure you do a full charge and then a full discharge with another full charge afterward. If you do not do this the life of the batery will be significantly diminished.
I hope this information helps. If you want more information in this subject ask a more direct question.

MacBook Air 2014 came with 12 charge cycles

I just got a brand new 13" MacBook Air from an authorized apple reseller, I went to check the battery cycles and there are already 12 on it even though I have only plugged it in once. Does anybody have an explanation for this? thanks

For what it's worth (and I don't mean to concern you at all as it is most likely very normal), I just checked the cycles on a Brand New Macbook Pro 13-inch (Mid 2012) and it has completed 0 charge cycles. I broke the seal myself and checked immediately without use.
You got me curious - thought it would be good to know

How does Mac OS calculate the charging Cycle count?

Hello, Guys
How does Mac OS calculate the charging Cycle count? I just used my MBP for about 15 min without power plugged in and I saw it left about 90% battery. However after the battery be recharged, I checked system profiler. It shows charging cycle count increased 1. I do remember that last time I left almost the same percentage of battery and plugged in. After the battery was fully charged, profiler did show cycle count increased.
So I am wondering How does Mac OS calculate the charging Cycle count? Basing on the percentage left or something else?
Thanks,

Ok,
But does it count continuously or separatly? I mean One time I used 10% and recharged full; and next time I used 20% and fully recharged again. Does the OS increase the cycle count when the usage adds up to 100% no matter how many times of recharge?
Thanks,

To find out how many charge cycles...

How can i find out with the Terminal how many charge cycles my battery has done?

Hi, If you go to:
- About this mac
- More info
- select power, from the contents
- and look under battery information you should see your cycle count.
Regards

Does Using Your iPod Touch While It's Charging Waste Charge Cycles?

If my iPod Touch is 100% charged and I use it while it is plugged in to my wall charger will it waste charge cycles as I use it?

But what if I'm playing apps on my iPod Touch...will the power from the wall power the iPod or will it use some of the battery in the ipod then charge at the same time, wasting charge cycles.

What exactly is a charge cycle?

Hi, everyone! So I recently just bought a MacBook Pro with Retina display (about 4 days ago) and I'm really trying to take of it, and it's battery especially. I've tried looking up some information on the best ways to take care of it, and I always come across people taking about things like "charging cycles" and "calibrating the battery" and I have absolutely no idea what those mean!
I don't mean to sound like an idiot, but keep in mind that I am completely new to the world of MacBooks. I've tried to research what these terms mean, but I've found nothing.
Please help and give me advice on how to properly take care of my precious MacBook Pro. I adore it so much and I want it to last as long as possible.
Thank you so much!

despite anything Apple.com has listed, the lithium-polymer battery is a KNOWN entity and its technical behaviour is a known entity, regardless of inside an Apple product or not...
having it plugged in everytime you use it is one thing, ....but some leave it plugged in 24/7 ALL THE TIME,...not a good idea,.....no hard, it just doesnt do the battery any good, and does minor wear on its lifespan.
Exactly lIke permanent magnets..., lithium polymer batteries dont like HEAT ,......perpetual trickle charging (leaving it plugged in alllll time time) is the unwise choice. "
"trickle charging is NEVER recommended for lithium polymer batteries" --- PowerStream.com, 2010-03-17

Adapter/charge cycle question

Sorry for all the questions. This will be my last one.
I use my iPod with a FM transmitter a lot at home and in the car while having it connected to the adapter. Does using the adapter still count as a charge cycle?. Say, hypothetically, I use the iPod + adapter for 15 hours straight, is that still one cycle even if the adapter is keeping the battery fully charged.

As far as I have read, 'top-off' charges are not detrimental to the iPod and may extend the life more than depleting the battery. Always 'exercise' the iPod from time to time.
See these battery links for more info. The first two articles are quite informative:
The iPod Battery Unplugged..
How to Prolong Lithium-Based Batteries
iPod Service & Support: Charging Your iPod
iPod Battery FAQ
Apple iPod Battery
iPod Battery Frequently Asked Questions (FAQ)
Caring for iPod's Battery
Charging iPod's Internal Battery
Tips and Tricks to get the Most out of Your iPod's Battery
Using the iPod Hold Switch to Prolong Battery Life
iPod's Battery Doesn't Charge
The Truth About the iPod Battery and Charging
Apple: Lithium-ion Batteries
iPod's Battery Indicator is Approximate / Battery Test

My Macbook Air 11 (late 2010) not charging "battery replace now) message 28 months old only 6 charge cycles. what could cause this?

I've unplugged plugged in. Checked the charger. Nothing runing. I've Shut down rebooted ran diagnostics and just about everything resolution I could find on-line. Its almost always plugged in and has not been used on battery power in a long time. Its not run down to zero power before. Just suddenly shut off the other day and won't charge now. Says replace battery now, but I just want to see if it could be something else. Hard to believe the battery went bad like that.
Thanks
Model Information:
Manufacturer:    DP
Device Name:    bq20z451
Pack Lot Code:    0
PCB Lot Code:    0
Firmware Version:    301
Hardware Revision:    1
Cell Revision:    173
Charge Information:
Charge Remaining (mAh):    0
Fully Charged:    Yes
Charging:    No
Full Charge Capacity (mAh):    0
Health Information:
Cycle Count:    6
Condition:    Replace Now
Battery Installed:    Yes
Amperage (mA):    0
Voltage (mV):    5104

mattk68
always plugged in and usually in sleep mode.
So it was always plugged in, never discharged, and was never really OFF, just in sleep mode.
Sounds like you got some half-true 'advice' from some people.
It DOES shut down when fully charged and you cant "overcharge" your macbook....., and the "others" were correct that your battery should be cycled every couple weeks at least.
what they didnt tell you is "plugged in and OFF is one thing.......plugged in ALL THE TIME...AND in sleep mode (for years)......NO!"
Heres some info for the "next battery" :
Keep it plugged in when near a socket so you keep the charging cycles DOWN on your LiPo (lithium polymer) cells / battery.
*Contrary to some myths out there, there is protection circuitry in your macbook and therefore you cannot 'overcharge' it when plugged in and already fully charged
If you leave your macbook plugged in all the time, take it off charge and drain the battery down to 15 or 20% every couple of weeks or so.
LiPo (lithium polymer, same as in your macbook) batteries do not need conditioning. However...
LiPo batteries do NOT like to be dropped down to 15% or so often,....key word being "often"
A lot of battery experts call the use of LiPo cells the "80% Rule" ....meaning use 80% of the charge or so,.. then recharge them for longer overall life.
Never let your Macbook die from power, you can corrupt files that way, and the batteries do not like it.
**Also new evidence suggests that sudden loss of power can adversely affect data on a SSD (solid state drive).....again, dont let it ever shut down from total power loss
The only quantified abuse seen to LiPo cells is instances when often the cells are repeatedly drained very low.
Contrary to what some might say, LIPo batteries have an "ideal" break in period. First ten cycles or so, don't discharge down past 40% of the battery's capacity.
Same way you dont take a new car out and speed and rev the engine hard first 100 or so miles.
*Also, if youre going to store your macbook away for a few weeks or more,... make sure it has at least a 50% or so charge.
*Cycle count / use/ lifespan is one thing that cant be countered.
Proper treatment is another thing. Just because LiPo batteries dont need conditioning in general,.. does NOT mean they dont have an ideal use / recharge environment. Anything can be abused even if it doesnt need conditioning.
Just use and enjoy your new macbook,
From Apple on batteries:
http://www.apple.com/batteries/notebooks.html
http://support.apple.com/kb/HT1446
but really all you would keep in mind is --"consider 15-20% is the same as 0% and recharge it"
and best "tip" is if its near a socket, .....plug it in as long as you can (especially at home) since cycle count on the battery are the "miles that wear out the tires (battery)"

Why is my charge cycle not zero?

I just purchased my macbook pro 13inch (mid 2014) from a IT fair, 2 days ago and charged it ONCE to 100%. However, today when i checked my charge cycle, it reflects 3. Is this normal? I tried to google if anyone has similar issue but can't seem to find anyone who does so. Does this mean that my macbook might not be a brand new one?

renaa92 wrote:
I just purchased my macbook pro 13inch (mid 2014) from a IT fair, 2 days ago and charged it ONCE to 100%. However, today when i checked my charge cycle, it reflects 3. Is this normal?
Yes. That is normal.Testing the battery at factory can add 1 or 2 battery cycles.
Best.

I have an 11 week old Macbook Pro that has 15 charge cycles and the design capacity is at 91%, is that normal or should I take my laptop into the store?

Hi, everyone I'm just wondering whether my battery life is normal. I've only had this macbook pro for a few weeks. According to coconut battery, as well as the information under about this macbook. The macbook is 11 weeks old and after 15 charge cycles it is at 91% design capacity? Is this normal or do I have a faulty macbook?

The batteries are supposed to hold 80% at 1,000 charges now - not sure when this started but was a couple of years ago maybe.
Personally I would not worry too much. If you actually notice a signigicantly bad drop in battery life after some time, instead of just by looking at numbers on charts, then yes take it to Apple, but for now, just enjoy your computer.
After more charge cycles, it may become more accurate too - when I first got my MacBook Air it was on about 94% after only 15 charges or so, now it's on about 620 and is on 84% or so which is on par with the 1000 charges -> 80%.

HT1476 How often the charging cycle to be done before the replacement of the battey. Likewise, is it ok to use the iphone while charging such as playing and watching movies. Please give me a reliable answer because this is my first time to use iphone.

Is it ok to use iphone while charging? Such as playing and wathing videos, or performing internet? How often the charging cycle to be done before the replacement of the battery? Can u please give me reliable answer because this is my first time to use iphone. I've wondering about the battery, since its built-in i wanted to care about the battery.

Roelt wrote:
Is it ok to use iphone while charging? Such as playing and wathing videos, or performing internet? ...
Yes.
How often the charging cycle to be done before the replacement of the battery?
Read this:
http://www.apple.com/batteries/iphone.html

How do i prevent or lessen a charge cycle to complete?

(i'm using coconut battery)please help me my mac has already 34 load cycles
13 weeks old
how do i avoid completing many charge cycle
....please help

A load cycle is one 100% discharge and recharge of the battery. This can happen all at once, that is, draining your battery to 0% and then recharging it to 100%. Or it can happen cumulatively, for example, discharging your battery to 80% five times, or to 50% twice, or to 75% once and then 25% the next time, and so on.
You can minimize the battery drain by doing less when you are unplugged: turn the brightness on your screen down, turn off bluetooth and/or airport, avoid games or videos that will draw a lot of power to process.
The easiest way to avoid adding cycles is to leave your MacBook plugged in when power is handy. It is okay to leave your MacBook plugged in even when the battery is charged to 100%.
Obviously, you cannot do this 24/7 for the life of your MacBook; it is a portable and intended to be used off AC power on occasion. So exercise the battery regularly and calibrate it fully (let it discharge until it goes into hybernate mode, leave it for five or more hours, and then charge it fully to 100%) every month or two.
If you have 34 cycles in ~100 days, you are averaging one cycle every three days, which is not that bad. But the more you leave it plugged in, the fewer cycles you will accumulate.

How do I perform a charge cycle?

Is it really necessary? I mean batteries need to be replaced someday.
How many charge cycles does an iPad have??

Calibration?
Run your iPad battery from 100% down to 0%
Do it once a month for accurate reporting of battery status.

Charge Cycles?

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