13" MBP Battery Capacity

Anyone else seeing their battery capacity drop off?
I got my 13" MBP back in Mid June, and since then my battery capacity has declined to 95% (max capacity is now 5201mAh) with 49 cycles. I have calibrated it a couple of times new but it hasn't helped in any noticeable way.
The MBP does tend to live plugged in over night (and on) collecting tweets but then I used to do that with my old white MacBook without causing any problems to the battery.
At this rate of drop off I would be surprised if the battery readed its 1000 charge cycles at 80%

That's normal. The decline in battery capacity is not linear.

Similar Messages

2008 Refurb MBP battery capacity

Hi all...I recently had to return my mbp battery when it crapped out, and i'm currently using the replacement (thanks apple)...I've been regular with calibration etc. (did it as soon as the battery was installed)...What I didn't do was check the initial capacity. my current cycles/capacity is 52/4742.
Based on what I've been reading around here with people having 5500-6000 mAh full charge capacity, am I wrong in thinking mine seems low, or is it ok for the charge cycles?
Thanks for any help!

The nominal Full Charge Capacity of your battery is about 4650mAh, and it's currently indicating more than that — which is commonplace. The battery in my own 5,1 was still pretty consistently above its nominal capacity after nearly 100 cycles and a full year of use, averaging out the normal small up-and-down fluctuations from one day or week to another. So you've got a good battery.

7 months MBP battery capacity

Hi,
I'm trying to find out the range of battery capacity for a 7 month MBP. The original battery capacity was 4600 mAh and now it only has 4439 mAh left. Is this normal?
I do calibrate my battery every 2 weeks and I tried resetting the SMC.
Any input would be appreciated!

The figures look fine, PaRaDa, but that is a pretty low cycle count for 7 months usage. Do you run it on the mains most of the time or is it just not heavily used?
These batteries tend to last best if you vary the usage pattern a bit, running off the battery for a while every day or two, etc., without necessarily taking it all the way down to flat.
see http://www.apple.com/batteries/notebooks.html for some useful advice on maximising your battery's life.
Recalibrating every few weeks is a good idea if your MBP is generally hooked up to the charger, or if you don't use it a great deal, but every fortnight is probably overkill.
I'd be aiming for a bit less frequent full recalibration, and maybe a bit more general use "off the charger", to get the best out of it.
But as Fred says, 96% is still pretty good after 7 months.
Cheers
Rod

What is the normal MBP Battery capacity?

I have an approx. 1 month old MBP; the first battery was just replaced by Apple. I received the new battery on Friday and let it charge fully. On Friday evening, I turned on the MBP and saw that the battery showed "original capacity 5500, current capacity 5391 (fully charged)". I thought that a bit strange, so I decided to calibrate it following Apple's instructions. On Saturday, after fully charging it again, it showed "current capacity 5301". So, now the capacity is worse - ?
Before calling Apple, I'd like to know if it's normal to have a 5% capacity reduction within about 24 hours - at that rate, the battery will be dead shortly.
I'd appreciate any input/experiences with battery capacity.

FIGURED IT OUT! My battery level reached 95% and the battery status said, "the battery is not charging"
I looked it up on apple support and found this very useful section in the Macbook Pro User's Guide:
"If the battery icon in the Finder menu bar is set to show the percentage of charge, you might sometimes notice that the battery does not attain a full 100 percent charge when the power adapter is attached. This is normal behavior; battery life is maximized if charging is not continuously cycled on and off when the battery’s charge capacity is between 95 and 100 percent. When the battery level eventually drops below 95 percent, it will charge all the way to 100 percent."
This fits with my problem. This macbook pro has been literally plugged in for well over a week!
So much for the "apple products are losing their quality"

MBP Battery capacity ?

Hi..
I bought MBP 15" on December in Thailand. Everything was fine and on June I found out the full charged Battery capacity was reducing from 5500mAh to 5320mAh. Every time I charged the battery the capacity seemed going down. I went to talk with apple center and a week later they replaced me a new battery which has 5520mAh(brand new battery). So, it's May 1st and it has only 12 charge cycles and now max battery capacity shows "5233mAh". Damnn second time and I went to the store again and they said... wait until it drops to 80% and they will replace it for me and yes by looking me with weird eyes. They said all the MBP batteries are always like this. What is this? Can't I have the right to replace with this god **** failure?
http://discussions.apple.com/thread.jspa?threadID=935410&tstart=0
Take a look at this link. This guy's battery capacity I've never seen this good condition before. >>>5813mAh 9months<<<
Calibration? Reset? My battery doesn't seems to appreciate those.
any suggestion please? so... should I have to wait till it drops to 80%? This ain't right. What should I do?
Help
Thank you<br>
Mac Book pro 15" Mac OS X (10.4.8) Core 2 duo 2.16GHz Ram-2GB
Message was edited by: MBP VS VAIO SZ

" Lithium-Polymer batteries will lose capacity with each charge cycle. After about 500 charge cycles (on average) the battery will need to be replaced. "
hmm.. I do understand now that Lithium-polymer batteries will lose capacity with each charge cycle like you said. But can you try to think again that my battery charge cycle has only 12 times and it dropped to 5233mAh from 5520mAh (2months). Isn't it too fast? so.. technically when I reach another 12 times and all together 24charge cycles my battery capacity would be around 4800+ mAh?
http://discussions.apple.com/thread.jspa?threadID=935410&tstart=0
I do understand this guy because his battery has 123 charge cycles + nine months
why I'm so sure of this because I do notice that every time I charge my MBP... the battery drops like 30mAh each cycle.
Thank you
Thanks to Kappy also

MBP battery capacity at 59%

Hi,
My MBP battery has suddenly decided to go from its original capacity at 5500 mAh to 3256 mAh.
I've tried draining the battery completely and charging it up again but this has not solved the problem.
Further to the problem, the OSX battery indicator drains to 0% and then goes to sleep, but you can just hit a key and it wakes up again and will continue to work for a while but when it genuinely hits 0% battery life it just shuts off cold. No warnings or Sleep mode.
Is this a hardware or software issue?
I just wanted to know if anyone else has had this problem before I have to ring Apple support up, which based on several past occasions I hate doing.
Don't get me wrong, I love using my Mac and always have from the start but this is the 4th time I've had a serious issue with it.

Hi !
I have exactly the same issue with my Macbook Pro (purchased on Dec.2007).
Only 3770 mAh capacity and nothing helped (3 x Battery calibration, PMU Reset, PRAM Reset). I just called Apple Care and after 50 Minutes explaining and listening to music on hold I will finally get a replacement battery via UPS in the next few days. I hope, that solves the problem. Stay tuned, I will report on the progress.
Any feedback of similar problems is appreciated !
Bye Wayne
Macbook Pro 2,16 C2D Mac OS X (10.4.8)
Mac OS X (10.4.8)
Mac OS X (10.4.8)

20 month old MBP with only 80% battery capacity

Been noticing my 09 alu uni body 13" MBP now has a battery capacity of just 80%, according to Coconut Battery. I realise this app might not be too accurate, but I only checked it as I've been noticing a reduction in battery life recently.
I've been using MB's for years and employ all the usual good practices, I also regularly recalibrate the battery, although I understand these new non-replaceable models don't require it, nonetheless, it can do no harm.
My question is, is such a reduction in the batteries capacity normal on this machine after just 20 months use?
BTW- The use consists of running on mains at work during working hours, resting over night during the week, use on battery/mains at home at the weekend. According to Coconut the battery has had 348 cycles. Again, no idea how accurate this app is!
I have 3 years cover on the machine, so it it's deemed this is not usual I can pay the Apple store a visit, but I'd be interested in the views of other users whether this is normal or not.
Thanks.

If you think that's necessary. But losing 20% capacity in almost 2 years is pretty good for any battery. It's just that we can monitor it more accurately now.
You can get your current capacity vs design capacity via Terminal without coconut:
ioreg -l | grep Capacity
^that's a -L and then a |

MBP 17" Battery Capacity and Run Times : Survey

I've had 2 MBP 17's so far, and I'd like to get a general idea from everyone about their battery capacity and run times they are experiencing.
My first MBP17 had a Full Charge Capacity of ~5900mAh before calibration and PMU reset, and 6800mAh after. This translated to about 3:40 of run time under light load.
My current MBP17 had a Full Charge Capacity of ~5899mAh before calibration and PMU reset, and 6942mAh after (currently). This translates to about 3:48 of runtime....still trying to get some more real-world run time numbers under different loads.
This proves to me that it is quite critical to calibrate your battery and reset your PMU at least once to ensure that your battery is reporting it's correct capacity. I'd be interested to know what everyone else's batteries are reporting.

I've had 2 MBP 17's so far, and I'd like to get a
general idea from everyone about their battery
capacity and run times they are experiencing.
My first MBP17 had a Full Charge Capacity of ~5900mAh
before calibration and PMU reset, and 6800mAh after.
This translated to about 3:40 of run time under light
load.
My current MBP17 had a Full Charge Capacity of
~5899mAh before calibration and PMU reset, and
6942mAh after (currently). This translates to about
3:48 of runtime....still trying to get some more
real-world run time numbers under different loads.
This proves to me that it is quite critical to
calibrate your battery and reset your PMU at least
once to ensure that your battery is reporting it's
correct capacity. I'd be interested to know what
everyone else's batteries are reporting.
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 6864
Remaining Capacity (mAh): 6862
Amperage (mA): -469
Voltage (mV): 12436
Cycle Count: 2
William

MBP Original Battery Capacity?

I have a 9 month old (June 2009) 17" MacBook Pro5,2 with the new built-in long life battery (the battery is not user replaceable). I think the battery is faulty as battery life from fully charged to empty seems significantly reduced.
"About This Mac" reports battery full charge capacity at 8783 mAh, battery condition as "Check Battery" and cycle count for this battery is 65
iStat Pro reports battery health at 64%.
coconutBattery doesn't work for this model MBP as it's reporting original battery capacity at 1300 mAh.
How can I find out what the original battery capacity was so that I can compare current capacity with original capacity?

G'day Stolds, and welcome to the forums.
Your 17" came with a battery which Apple specify as a "95 Watt hour" battery.
The "nominal voltage" for the battery in the 17", used when converting from Watt hours to mAhs is 7.3V. (unlike the 15" and 13" which have a 10.8v battery)
P=vi (Watts = volts x amps)
Therefore i (amps)=P (watts)/v (volts)
95/7.3 = 13 Amps (roughly)
Multiply by 1000 to get mA
so this is a battery with roughly 13000 mAh capacity when new.
The non-removeable batteries in the unibody MBPs are rated to maintain 80% of original maximum capacity for 1000 cycles .
Your battery is way below par, and clearly defective. Take it in and get it replaced under warranty.
Cheers
Rod

Battery capacity of new 15" MBP (removable)

I have a late 2008 15" MBP, the last model with removable battery; bought it two and a half months ago. The maximum charge ever reported for it is 4563 mAh. Shouldn't these be 5000 mAh batteries? Is mine starting with 90% capacity then?
And yes, I've calibrated it few times since. Funny though, thanks to a more power efficient chipset and LED lighting, it actually has better battery life than my earlier non-unibody, non-LED MBP has with a brand new 5500 mAh battery, but still...

The Late 2008 15" unibody MBP battery has a nominal new full charge capacity of 4630 mAh (calculated). The 'health' widgets round that to 4600 mAh. So, your battery is perfectly fine.
For more details, see the Battery Health section of my User Tip:
http://discussions.apple.com/thread.jspa?threadID=1764220

Fluctuating battery capacity. can you give any tips to maintain my 596 cycles? (1 year old MBP 2012 13")

battery capacity went from from 80.4% to 78% to 86% within the same day. is this normal?
i alraeady have 596 cycles
1year old mac with applecare
before i'am always draining my battery, now that i knew that it is bad, what should i do now?
any tips and suggested routine?

Here is a list of Apple support documents regarding batteries.
http://support.apple.com/kb/ht1446
Look at the articles under the 'Optimizing battery life' category.
Ciao.

Fluctuating Battery Capacity

Yesterday my MBP had a funny turn relating to it's recognised battery capacity. I had been using it for most of the day on fairly boring tasks and I was running it on battery power when all of a sudden it shut down on me. I plugged in charger and fired it up and when I looked at the battery it was at 0% however the capacity had fallen by over 75%.
Originally it was about
93% of original
4440mAh
270 load cycles
10months old
All of a sudden it was
16% of original
762mAh
I used System Profiler and Coconut to check the levels.
I left it charging for a couple of hours until it said it was full then I turned it off. I let it cool, took the battery out, dusted it, polished it and put it back.
When I turned the machine back on the battery capacity was back to 93% original.
The basic question is has anyone seen this before? Quickly followed by software glitch or intermittent hardware fault.
Cheers for any help.

The design capacity of a new battery is often exceeded slightly by its actual capacity. You got a good one.
My late-2008 MBP's battery has a design capacity of 4600 mAh, but it started off at about 4800 and still has never gone as low as 4600, after 11 months and 64 cycles. Right now it shows 4622.
It isn't possible for your MBP to have operated on battery power for 24 hours without sleeping. Something is wrong, not with your battery but with your story.

Concerned on current battery capacity

i have had my mbp 13 for exactly a month now and the battery capacity is now at 92-93%. It now has 21 load cycles! i dont know if im doing anything wrong but i do use it for school(uses AC adapter) and at home(Ac adapter also). When using battery i only deplete it around 50%~. and according to coconut battery, i now have 5096 mAh compared to the original 5450mAh. Is there something wrong?
ps: my friend also has a mbp and his is refurb, but its still holding the original mAh and has less load cycles.
thanks in advance

I too have concerns about my new battery.
I've had it for a week, it's at 6 charge cycles (no worries abotu that)
my paranoia comes in when i look at battery capacity.
I haven't gone past 97% and it plays around 95-96% of battery capacity. Is this normal for a new machine? I'd be expecting nothing less than 100% battery capacity for something new out the box.
And yes, ive done calibration, but still doesnt manage to get to its maximum charge capacity.
Can i expect things to improve? I know this might seem unnecessary if it's at all normal, but then again, I just want to see a new thing display perfect and new specs.
Thanks guys

Apple employee: Does AppleCare covers a short-lifed MBP battery?

If AppleCare does cover, to what extent ? for example, will apple replace my MBP battery for free if it drops to 80% of the original capacity, in one year? any restrictions on the replacement, such as 300 battery load cycles?
Thank you, i hope to see definitive answers!

You're not very likely to get an Apple employee to answer here, as these are user-to-user forums. (It does happen on rare occasion, but it truly is rare.)
From watching the notebook forums here for a few years, I'd say this: Apple is vague on this subject. Your best bet, if you feel your battery isn't working as it should now or some months down the road, is simply to call AppleCare and negotiate what you can. Reports vary, and your mileage may vary based on who you talk to and how you present your case. (You can at least change who you talk to if you're not satisfied with the initial answer. Ask to speak to a supervisor or, if necessary, to Apple Customer Relations if you feel you're not getting the warranty service you deserve.)
Sorry I can't give more definitive answers, but it's one of those issues that doesn't have a definitive answer, unfortunately. You'll get a variety of responses from people here, all reporting different experiences. Ultimately, the answer is simply, "Call Apple and find out."
All that said, if the situation is extreme and obviously points to a defective battery, such as only getting one hour of charge from a calibrated battery that is only a month old, you shouldn't have a problem getting it replaced under warranty. But your question of where Apple draws the line in less extreme cases is what can't really be answered by people here.

Sudden Reduction in Battery Capacity

I have a MacBook Pro which is 11 months old. Suddenly within the last month the Battery capacity has dropped to 2112 mAh from 5500 mAh. Is this the sign of a defective battery?? How long to MBP batteries usually last?

Didn't know if I should start a new thread or respond to this one.
My MBP July 2007( 8 months old?) Battery always reported about 95+% life until I Calibrated it for the first time about a week ago. Now I'm seeing 2:30 in time at 65%
Below are the stats right after a recent full charge, should I go see the Genius Bar or is this normal...
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 5
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 3209
Remaining Capacity (mAh): 3209
Amperage (mA): -115
Voltage (mV): 12416
Cycle Count: 120
AC Charger Information:
Connected: No
Charging: No
Hardware Configuration:
UPS Installed: No

13" MBP Battery Capacity

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