Weird decrease in battery health

3 days ago my battery health was at 94% with 103 cycles and today it is at 85% with 106 cycles. I have noticed a slow decrease but 9% with only 3 cycles!...is this normal?

This issue comes up all too often. The basic problem is one of TMI - Too Much Information.
The battery health percentage information is only a semi-intelligent guess. There is no point in agonizing over insignificant variations. I wish Apple would make the information only available to service locations. It does nothing to actually help the average user.

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Battery health decreased rapidly after charging problems.

Hy a few weeks ago the health of my mid 2010 MacBook Pro was still 79% which is normal since it has more than 1000 cycles.
Then following incident happened:
My battery was almost discharged, 30% or so, so I connected it to the AC power. After a while I wanted to see how much it was charged but the indicator in the corner still indicated the same 30% or so, only when I disconnected it it changed to something in the 80% range. I used my computer for a while like that and I noticed that the battery indicator was not chaning. Only when I connected or disconnected the AC power did it update.
I decided to reboot the machine and this solved the problem. I recently noticed however that my battery health now dropped to 63% which seems very much in a short period of time.
I know that normally charger will deliver less current to the battery when it is near 80% in order to prevent overcharging and maintain battery life as much as possible. I wonder however if the drastic decrease could be because of the power management thinking that the battery was only partly charged and thus delivering to much current to an almost full battery? If this is the case do you think that Apple would intervene for the costs of a new battery? I know I would have had to replace it sooner rather than later but this does change a lot I think. My computer is not in warranty anymore and I don't want to pay 49€ for one intervention. There are also no official Apple stores in Belgium and the authorised resellers really don't offer the same service.

sweex,
since your battery has over 1000 cycles and has 79% of its original full charge capacity remaining, Apple considers your battery “consumed”; they will not intervene for the cost of a new battery. It’s entirely your decision when to replace your battery, but irregular charging results are to be expected for as long as you use your present battery.
If no Apple-authorized service center in Belgium offers the option of changing the battery, then you should let Apple know so that they can find an organization who will do so. I don’t know where you are in Belgium, but this search around Brussels shows seven different Apple-authorized service centers which all claim to service Macs, and the one in Aalst is noted as being a Premium service center.

Why is my battery health decreasing so rapidly????

I bought a new one like 3 weeks ago .. it has 10 cycles and the battery health has decreased from 98% to 95% in these last few days .. I usually have it connected to Ac power and discharge it like every 4 days.. thats the 10 cycles .. why would the health decrease this much???

Apple battery or 3rd party battery? Do you mean the overall charging capacity has dropped from 98% to 95%. Mine has 15 cycles on it and it charges to 100% and if I leave it plugged in for a few days it will drop to 97% and that's perfectly fine.

Why is my battery health decreasing so quickly?

Hello. I just bought my Macbook in January. The battery health is decreasing rather quickly. Yesterday it was at 90% health and today it is at 89% health with 130 cycles. I always calibrate it. What can I do to save my battery's health from decreasing so quickly? Why is it decreasing at this rate?

Apple notebook batteries – maintenance and troubleshooting
http://support.apple.com/kb/HT1446 Apple Portables: Tips for maximizing your battery charge
http://support.apple.com/kb/HT1490 Apple Portables: Calibrating your computer's battery for best performance
Maximize the battery life

My MacBook Air's battery health is decreasing.

My Macbook Air's battery health is decreasing. I bought it around a year ago. Now it's battery health is 85%. However, it keeps changing. From 85% to 88% and sometimes it hit 90%. Is my macbook's battery healthy? And is it normal, because I bought it a year ago.
Here are my battery's properties:
Cycles ; 404
Health : 85%
Design Capacity: 6700 mAh
Current Capacity: 5703 mAh

i have to disagree with linc davis's reply.
system profiler, or what they call the system report will have your current battery health status. in power the system profiler will either display "excellent", "normal" or "check battery" the more charge cycles you have, (404 which you stated) the more the battery will loose some capacity. this is normal of lithium ion batteries
health 85 % is current capactiy (fully charged) divided by design capacity * 100 or
5703 / 6700 *100 = 85%
my mac book air, having it for a year states
cycle count 163
Condition : Normal
Charge remaining 4223
full charge capacity 4263
but system profiler, at least on my mac book air running osx 10.8.2 does not list design capacity. so i am wondering where you got that number. the mac book air i have is the mid 2011 11" model
if you feel after 400 cycles your battery diminished and you have apple care you can always ask them to replace the battery, but if you did not get apple care, then the year warranty would be up. a new mac book air battery outside of apple care or any warranties is $129 before tax at the apple store.
eventually the more cycles you have ( a cycle is being fully charged from being nearly discharged ) the more you are going to have to replace the battery. whenever you feel you are not getting the charge you used to get the discision to repalce that battery is your choice, but eventually you will have to replace it.
for example say the battery used to give you 3 hours amd now it only gives you 30 minutes, then yeah replace the battery. but if the time lost in capacity doesn't bother you that much, then don't replace the battery now

Can Apple replace my macbook pro (mid 2012) retina's battery if I think that the battery health has gone bad/in need of and renewal?

Can Apple replace my macbook pro (mid 2012) retina's battery if I think that the battery health has gone bad/in need of and renewal???
I've had my Macbook for about 11 months now and i use it every day; its gone though about 420 cycles of charging and using the power, and i noticed the battrey preformance has decreased (as expected). The problem isn't sevear yet but it would comfort me knowing that i could replace the battery in the near future
Please contact me or answer the question if you know anything about this!

Exitio\'s Apple wrote:
Can Apple replace my macbook pro (mid 2012) retina's battery if I think that the battery health has gone bad/in need of and renewal???
No only if they think under warranty/AppleCare, but your likely able to pay for a new battery if they have them, which they might not yet since it's such a new machine still.
BTW, I have a Early 2011 17" MBP, 27 months old, charges to 97% and has only 14 cycles.

My battery health went from 88% to 77% in less than ONE DAY!!!

my battery health is decreasing and so is my usage time .. help!

Sorry -- we can't fix your battery by remote control. Take it to an Apple Store or AASP for a checkup and testing.

New MacBook Pro 2012 with battery health at 92%

Hi everyone!
Few weeks ago I bought brand new MacBook Pro (2012, 13"). After 12 cycles the battery health significantly decreased to 92%. Quite unexpected, isn't? Could you advise me what can be a problem? AC adapter, socket in my wall or something else?
To answer your questions, I did not put the battery below 10% during this time.
Thanks in advance for any hints!

You have to take the computer to the Apple store to have it checked out.
Genius Bar reservation:
http://www.apple.com/retail/geniusbar/
Best.

Macbookair battery health problem?

I recently purchased a mid-2011 Air 13' i5 128gb and after 1 week of regular use, the battery health decreased to 95% (iStatPro and Coconut Battery). The battery life is of 5 to 6 hours doing word processing and Safari. The original stat of the bat was 98% and Coconut says that the battery has incredibly 28 weeks of life...
Is it normal? Do i have to concern about?
Thanks.

Hi, SP Forsythe,
I finish calibration and the stat is 96% and the current battery capacity rise from 6429 to 6452.
I`m a little bit relaxed about the "problem" after reading this thread that make sense to me.(https://discussions.apple.com/thread/2090860)
that says: "There is no problem. Simply do not give the ±5% to 10% battery health estimate any credence. Ignore it. It will fluctuate up and down, and the fluctuations have no significance whatsoever."
The point is that after spending lot of money in that little thing I don't wanna play with casualties...I'm going to the authorized representative to make a test. I just don't know if I can really trust this guys, after all, it's not good for them to return the product. And the problem looks like not important.
I don't know, let's see whats happen. After all, thanks for the help.

MBP battery health

Hello. My MacBook Pro is one year old and has gone through 145 cycles. iStat Pro reports that it has 72% battery health. This seems pretty low to me. I'm not sure I see a significant decrease in battery life, but I trust the widget.
Is this normal? I heard somewhere that one should calibrate the battery every thirty charges. If so, I have never once done this (frankly, I don't even know what it means).
Essentially I am asking: Is this normal? and What can I do?

I hate to shuffle you off to a different forum area but this link:
http://discussions.apple.com/forum.jspa?forumID=1151
is for the Power and Batteries on a MacBook Pro forum area where there are some astute gurus who can help.

Having serious issues with battery health, how could it be?

hello,
newbie to this forum but not to apple devices.
my big brother gave me his MacBook Air about 2 months ago. he bought it in august of 2009. when i got it, it ran Windows 7 (dont ask me why that what he wanted). i did update to the system and installed snow leopard etc...
after install the iStat pro i noticed that the battery is in good condition, 93%. i thought he ruined the battery cause he always plugs his laptops/netbooks to a power source.
i dont understand why but in the first month i had 90%-92% health, and in the past few weeks it went down to 88%-90% and a few days ago it was 86%. today i went to school and when i opened my mac the battery health os on 84%!
i really dont understand why.
i follow the instructions and wait until the battery is empty, recharge to 100% and again waiting... etc... there is no overuse and when im home i usually work on my stationary computer.
the computer overall is in great shape, i dont understand the problem maybe one of you guys can help a brother out...
thanks in advance!!!

hello,
newbie also to this forum, does anyone can confirm that when the battery gets older, the maximum load percentage will decrease so that 100% capacity will never be reached anymore?
Tks.
Erick

Lost over 20% battery health in Two Days!

Help! My battery health was at about 88% just two Days ago. I've had my MacBook for over a year now, so that sounded normal-ish. Am I right about that?
Then Yesterday my Battery shot down to 76% health.
Today I just checked, and it's at 66% health. I've been having problems with the Xs and so forth and nothing has been working. Do you think Apple will replace my Battery if I call them?
If I have no chance of them doing that, I mind as well just go out and buy the battery. But sudden drops in health like this, it's very disconcerning. This machine is my First Mac, and we're thinking about buying another one, but with this battery gloom and doom, the last thing I want to do is have to deal with another huge set of dilmenas.
I've faced Random Shut Downs (Cycle Number Two of those started yesterday. Suddenly when I have low battery the machine just "turns off". Can't even Calibrate my Battery because of this), Dirty Palmrests, Woes of Non-Universal Applications (No PC would ever have Microsoft Word launch so slowly). Sure my Mac is great when it's up and running... On the other hand, so many problems with just one machine.

I downloaded iStat Pro here: http://www.apple.com/downloads/dashboard/status/istatpro.html
It monitors all sorts of things: Temperatures, HD Capacities, Battery Capacity/Health, etc.
I used to have it, then took it off, and put it back on recently.
Also, I called Apple. New battery on the way.
Only thing I didn't like about the battery replacement was that they wanted my Credit Card Number on file. Kind of a pretty personal thing to want so Apple can make sure I return a damaged battery...
Anyways...

Best Battery Health not working in Windows 7 after Windows 8 installation

Hello everybody, I'm having an annoying problem with my G475.
It came with Windows 7 installed, and the option "Best Battery Health" was working fine.
Then I upgraded to Windows 8 (fresh install) and installed the Energy Management drivers.
Since "Best Battery Health" wasn't working on Windows 8, I installed back Windows 7 (fresh install).
But now, the option "Best Battery Health" is not working anymore!
It stays checked in the software, but the battery keeps charging until 100 percent.
I did the "Battery Gauge Reset". It finished and the problem persisted.
I also tried to change settings in safe mode, didn't work.
Please help!

hi kauptman,
Welcome to the Lenovo Community.
Just want to verify, have you also installed the following in order:
1. Intel Chipset Driver
2. AMD Matrix Storage Manager Driver v1.2.1.210
2. Lenovo Energy Management v6.0.1.5
If the apps listed above are already installed, I recommend you:
1. Drain the battery (use the computer until it prompts you that the battery is low)
2. Change your power plan settings to Power Saver / High Performance and re-test if battery stops charging at 90% or 95%.
If the problem still persist, I recommend you restore the unit by using the Lenovo Recovery Disc. If the recovery partition is still intact, click here on how to create a facotory restore dics.
Hope this helps.
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If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
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Cycle 23 but Battery Health 95%

cycle 23 cut Battery Health 95%
Battery Problem ????

How old is your Mac? 1-2-3 years old?
Batteries go bad even if the charge cycle count is low. They only last so long whether they are used or not. The last longer being used on a regular basis but not abused. Using them all the time and or leaving it connected to AC all the time will shorten it life span.
Use it but don't abuse it.
Message was edited by: Shootist007

Battery Health and ways to bring it up again?

I've had my MacbookPro for a little over two months now and 31 cycles on it. However, I have already lost 7% battery health, leaving me at only 93%. I'm pretty sure that this is not good, and that the loss shouldn't be this rapid.
I'm sure it has something to do with the way I use the computer. I leave it on quite often, which I know isn't a good thing, but had no idea that it would drain the battery like this. In some cases the computer is on for days at a time. I've gotten into a routine where each morning I turn it off for the bus ride to school, where I use it throughout the day. The night before it remains on so that I can quickly check things in the morning.
I currently use my MacbookPro as a semi-desktop. I have it hooked up to an external monitor, and use a wireless mighty mouse and wired keyboard, which is primarily the reason it's on for such long stretches.
Now that you have some background as to what I do with the computer I'd like to know if there is any way to replenish the battery health, or if that 7% is lost for good.
I've read up on this calibrating of the battery business, and I'm going to try it this weekend (can't during the week because I need it fully charged for school each day).
What exactly does this do? Does it actually replenish the battery health or just determine it's actual current percentage?
I'm using the widget iStat Pro as my monitor of battery health.
If any other information is required, I'd be happy to provide it.
Thank you.

dnovelta:
use the battery frequently and lightly for best longevity. Apple states "An ideal use would be a commuter who uses her MacBook Pro on the train, then plugs it in at the office to charge."
Read these:
http://www.apple.com/batteries/
http://www.apple.com/batteries/notebooks.html
Hope this helps...
Courcoul:
Full Charge Capacity (which is what the specific battery clocked at the factory when first tested).
Just a minor correction, but can be significant. Full charge capacity is not "what the specific battery clocked at the factory", it's a nominal value, i.e. a general property of the battery type, not that specific battery. Specific batteries have a range of full charge capacities (when new). In fact, it's not even measured, it's calculated - for the 15", it's a 60 Watt-hour battery (from the specs), and it runs at 10.8 V (printed right on the battery). Thus, with a basic formula (W = V x A), an algebraic rearrangement, and some simple math, 60 Wh / 10.8 V = 5.555 Ah = 5555 mAh (~5500 mAh, which iStat uses as the denominator for "health", although I have read that under Leopard iStat uses 5600 mAh, just a rounding difference). My 17" with a 68 Wh battery calculates to 6296 mAh, ~6300 mAh - my replacement battery actually started with ~6800 mAh in System Profiler.
Just FYI...

Weird decrease in battery health

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