MacBook Air :: Battery Loosing 20 Percent Charge During Sleep
May 7, 2008
After all is said and done, and heavy Macbook Air use, there is only one thing still bugging me. Its not the slightly uneven lighting, not the 3 hours charge nor the 3:30 battery life I get constantly, nor the 6200 RPM fan. When I charge to 100% and let it sleep for 12 hours, I lose about 20% of the charge. Yesterday I was at around 25% and when I opened it this evening, 24hrs later, there was nothing left. If I leave the macbook air closed, I think that the battery would reach 0% after 3 days. This is not normal and some kind of leak.
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Aug 20, 2010
I calibrated my battery for the first time since Dec. When I plugged it in this morning, it took 3 hours to charge all the way, and now it's stuck on 99% full, 0:00 till completely charged, and I'm getting an error when I click on the battery in the menu bar that says "Service Battery". When I click on the error, it tells me that it may not be functioning properly and to take it to an authorized apple service retailer. Before I waste 2 hours by going to the Apple store and back, has anyone else had this problem, and is there a way to fix it without having it looked at?
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Oct 28, 2010
I've been a member here for a few years but mainly kept in the background reading about news and other interesting things like mods and discussions.
A few months back I bought a 15 inch 2.4 MBP, the most recent model as far as I'm aware, from the refurb store in the UK and after a few troublesome experiences ( they delivered an iPad to me the first time) I finally got my computer. Ever since, there have been a few problems.
First my Logic board died, handed it in and got it fixed.
Second the Keyboard backlighting wouldn't work, same thing, handed it in and got it fixed.
Now it seems that my MBP can't hold the battery charge when the computer is turned off, which to me seems very strange as it holds the charge perfectly well, 5+ hours although I've never timed it, during normal use.
I recently installed and mce optibay for extra storage since I don't really need the superdrive and it works great. Could this by any chance have anything to do with the drain?
So to summarize my MBp can't hold the charge when computer is turned off but works fine when its on. I have an extra HDD installed where the superdrive used to be via mce optibay and everything else works fine.
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Jun 20, 2012
I bought a new battery for my sisters new used MacBook Pro. The instructions with the new battery was not to charge the new battery until it's was down to 2%. And, how many hours should she expect the battery to last until it needs to be charged? This is with normal web surfing with some streaming. The MacBook Pro is a 2.3 GHz Intel Core 2 Duo with a 15" screen form @ 2008.
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Feb 16, 2010
So I usually keep my UMBP plugged in at all times. It unplugged by accident and went to 99% so I left it unplugged but literally less then maybe 7 minutes my battery is already reading down to 92%. Brightness on screen is set all the way up, if that has anything to do with it.
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Dec 22, 2010
So when I bought this the guy said that Apple installed a new battery on it recently. I believe him because when I downloaded the iStat Pro widget it said only 2 or 3 cycles which is because I calibrated the battery. But I just finished charging and the light is green. But it says the charge is only at 97%. I don't see why it should be like this. Also when it's not plugged in the battery only lasts maybe 3 and half hours from just surfing on the internet. But I thought it was supposed to last like 6?(I'm thinking that since mine is an older model, that could be it.
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Aug 22, 2009
It's saying 99% Charged. Is this normal?
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Mar 27, 2008
I have a Week 01 MacBook Air, and I just started to notice that my MBA has not been performing its best since I bought it.
This morning I at 0745am, but now its 0831 and my battery is now at 53%; is there something wrong? I took a stopwatch and averaged it at about 53-55 seconds where the battery will drop 1%.
According to coconut battery, current battery capacity is 4670 and original battery capacity is 5090, and the system profiler says that I'm at 31 charge cycles. And YES, i've reset the PRAM, PMU/SMC, and calibrated my battery
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Nov 9, 2010
I have a week old 11.6" MacBook Air. The battery has 3 cycles. However, using Coconut battery the battery capacity is showing 96% fully charged. Would that be unusual after 3 cycles?
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May 3, 2012
Why is my Mac not at 100% battery after having it powered off and plugged in charging all night? As long as my charger is plugged in shouldn't it be at 100%? I never unplug it. It shows it is charging but stays at a constant 98%.
Info:
MacBook Pro (13-inch Late 2011), Mac OS X (10.7.3)
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Jul 27, 2008
Brand new battery wont charge above 47%. Plug light is green and shows charging.
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Dec 4, 2009
I believe the mechanism utilized by my laptop to route power either from the battery or the AC adapter, is faulty. Sometimes when the battery is connected to the laptop, the battery is not recognized and the battery icon has an 'X' in it, other times it shows a charge %. Just recently with a full battery, I removed the AC adapter from the laptop and the laptop immediately powered off as if the battery was not in place.
Assessed:
(equipment age) new linear power cable and new battery purchased in september
(connection) linear connection seems stable
(battery) charges and holds a charge
Possibly linear > battery transistor issue? Repair Options?
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Feb 8, 2012
I have my mbp just 3 weeks old and I tried to calibrate the battery just few hrs ago. I continuously used my mbp until the battery level reached to 2% (the warning message showed when it was 6%). Just then I had to receive a phone call. When I was busy talking, I noticed that the mbp has gone to sleep mode but when I returned (2-3 mins later), I found it shut down. Well, I think it should have remained to sleep mode but it didn't.
Then after an hour I connected the power cord and switched on and noticed a progress bar which I saw for the first time. I have been charging it for 40-50 mins, now. Also the health of my battery keeps fluctuating between 95-100 %. istat shows this. Is this normal? So what I want to know is, Is this normal for mbp to shut down when the battery reach that low? OR there is some problem in my MBP?
Info:
MacBook Pro, Mac OS X (10.7.2), 2.4GHz, 500GB HDD
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Mar 28, 2012
I would like to my macbook pro to be turned off at 5% Battery power, as it doesn't turn of correctly at 0%. I'm having this issue for some years now, and want to get rid of it. Which plist needs to be changed for this? Or is there a Terminal-Command that's providing this? I don't want to buy a new battery yet, cause the one I have is quite fine still. I already reset the SMC and the Parameters. Is the battery status relevant, when resetting the SMC? Here's what has been going on so far: [URL]
Info:
MacBook Pro, Mac OS X (10.6.8), 2,5GHz 8GB Ram
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Aug 20, 2014
Just bought a new 15 inch retina MBP. My question is...should I immediately charge the battery or let it run to zero first and then charge it? Does it even matter?Â
Info:
MacBook Pro with Retina display, iOS 7.1.2, Retina, 15 Inch
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Oct 10, 2010
The battery on my MBP (2007 2.33 Core 2 Duo) has started to die, just like the three others that came before it. It seems like it's only been a year or so since I got a new battery. Yesterday, I was using it unplugged and the computer shut off when the battery was around 58%. I have never seen a battery shut off that early. The worst I had seen before that was a previous battery that would die around 35%.
A couple questions:
1. Is there something I am doing that is causing my batteries to keep dying so quickly? An Apple Genius told me that keeping the computer plugged in all the time can burn out the battery. I don't really want to bother putting the computer through unnecessary charge cycles to keep up the battery life.
2. Is there any way to recoup some of the lost battery life of my current battery, or is it just dead?
3. In replacing the battery, should I buy another Apple battery from the website, or are there better quality 3rd party MBP batteries?
4. On a side bar, I am thinking about purchasing a new MBP, but I am worried that the battery will have the same problem, and it will be much more of a hassle to fix because everything is internal now. I hate having to hand my computer over to Apple Care for a whole day and be without it.
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Nov 3, 2010
So I bought a macbook pro 13" about a month ago. I've been running coconut battery tests on it and the battery health is only at 89%. This is super upsetting to me. I went to the apple store and they ran their diagnostic test only to tell me that my battery is within specification, so they wouldn't replace it. The health they calculated was 91%.
What should I do? This seems unfair to me.
Coconut battery stats:
Battery capacity: 5141 mAh
Original battery capacity: 5770 mAh
Battery load cycles: 27
Age of your mac: 4 months
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Nov 16, 2010
So I just opened Coconut battery, and it is saying that I have 101% battery capacity. How is that even possible? In the other hand, iStat says 100%.
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May 7, 2010
I've had my Macbook Pro for just over 2 years and recently bought one of the 2010 models. I'm about to sell my old one but when I downloaded Coconut Battery, I saw that my battery holds a lot less charge than it did when it was new: Have I been doing something wrong or is it just low because the laptop is 2 years old? If it's something I've been doing, I don't want to make the same mistake with my new one.
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Jan 31, 2012
I usually keep my mac connected to AC power and probably once a week I try to drain the battery. It only has 28 cycles. I bought it last year on november and today when I removed the ac power, a little while after I realized that the battery health went from 88% to 77%! What can I do? I am doing everything that mac says to keep a healthy battery!
Info:
MacBook Pro, Mac OS X (10.5.8)
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Feb 5, 2012
If I use my battery to 98% and I charge it, it shows it as fully charges. My cycle count is 4 and it is the 13'' mbp. It is 2 weeks old. I already calibrated it.
Info:
MacBook Pro, Mac OS X (10.7.3), I have had this for 2 weeks now.
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Mar 31, 2012
I just bought my macbook pro not long ago. around 2months? And my battery is going down really quick. 1% every 3 mins and I only have firefox on and my backlight is turn off. My brightness is turn on to the middle. I was looking at my friends macbook. Doesn't seem to be going down so quickly.
Info:
MacBook Pro (13-inch Late 2011), Mac OS X (10.7.3)
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Jun 5, 2012
my macbook pro not charging. the battery is running low on 20 percent i puted it on charging it says not charging and light in charger is green what the problem can be?
Info:
MacBook Pro, iOS 5.1.1
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Nov 23, 2010
I'm having a strange issue with my MBP 1, 1. It's recently picked up a new habit that I find to be rather annoying. When the battery gets down to between 5 and 10%, the laptop will just shut off. No hibernation, no sleep, just a hard shutoff. The battery seems to be in good health; although it does have a high cycle count, I still get around 2 hours of usage out of a charge. I would think that a calibration would solve the problem, but with the hard shutdown, would that even be possible?
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Jul 31, 2009
Ok so to start off, my Macbook Pro is around 3 years old. With my original battery having been through 350+ cycles, I had to buy a replacement. So I did some research and found that the Fastmac battery was my best bet for a long-lasting, reliable battery. I would say that Ive had the Fastmac battery for a bout 6-7 months without any problems whatsoever. However, recently Ive been noticing the drastic change in battery life. I installed Coconut Battery yesterday and discovered that my current battery capacity is 2266mAh with the original capacity being 5800mAh and 213 cycles. I also should note that the battery drains 1% a minute with no programs running (besides the Activity Monitor, which showed no strange behavior). Now luckily for me, My Fastmac battery is under a 1 year warranty, however I just wanna verify that it is a fault with my battery and not anything on my Macbook's side causing the battery to drain so quick. The last thing I want is to receive my replacement and then have to go through the same process 6 months later.
Also here is the Battery Information from the System Profiler.
Battery Information:
Battery Installed:Yes
First low level warning:No
Full Charge Capacity (mAh):2266
Remaining Capacity (mAh):1414
Amperage (mA):-1449
Voltage (mV):11421
Cycle Count:213
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Aug 30, 2009
Any reason this would be happening..?
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Oct 5, 2009
I noticed that my battery cycle (according to istat) switches over at 15%. So as son as it switches over to the next cycle I plug in the adapter to make the battery run a cycle from 100%-0.(I know the cycle in 100%) But it still switches over at 15%, that means that the battery ran only 85% of its capacity. How can that be? Is it possible to reset (delete) battery cycle data?
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Mar 5, 2010
I have a 5-year-old PowerBook G4. I remember I changed the battery about a year or two ago, because when I used to take it to classes in college, and use it unplugged, my laptop would shut off in less than an hour (more like ~30 min) when it reaches ~30%. After I got a new battery, it went back to normal, and lasted much longer. In the past couple of days, I noticed that within about 5-10 minutes of using my PB unplugged, battery goes from 100% --> ~85%, and then all of a sudden shuts down.
When I plug it back in to a power supply, and it starts back up, it starts recharging from 0%... this seems a little extreme. I haven't noticed this problem because I almost have it plugged in these days, as I usually use it at home or at work where I have a power supply available, and I use it for a few hour period at a time. Does this seem purely like a battery problem?! (ie. it's just time for a new battery...)
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Apr 15, 2010
Why would a battery one day out of the box only be capable of charging to 6808mAH / 6900mAH? Could it just be a matter of the battery not being calibrated yet?
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Apr 22, 2010
So I just got my first MBP, and I have calibrated my battery. Both iStat and Coconut Battery report my battery health is 98%. Do you think this is reason for concern, considering the MBP is supposed to be new? What is your new MBPs battery health?
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