Battery Capacity dramatic drop overnight

My power adapter was behaving stragely, so I took my battery out and put it back in. According to coconutBattery, my battery was at 92% of orig. capacity yesterday, and only 84% today! I don't know when excactly the change took place, but it seems very mysterious and troubling. Any idea what could have caused this?
Thanks!

Hi. If you haven't calibrated your battery yet, now would be a good time to do so. Also, it would be better to read the info off system profiler. Check that and see if the same it has the same info. Also, resetting the SMC could help. Here are the links.
http://support.apple.com/kb/ht3964
http://support.apple.com/kb/HT1490

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T430s battery capacity sudden drop

Hi, I have a look at my battery report today and found something really awkward. I bought the computer seven months ago, and the battery start with Design capacity 44,000wWh, while the full charge capacity is quite closer to the design capacity. However in the battery report it shows that two weeks ago the design capacity suddenly drop from 44000 to 40734mWh in one week, and then afterwards it drop to 39000mWh. And the actual full charge capacity seems to linger around 37000mWh. Is there something wrong or is my battery just wear out naturally? Best,Eddy

tamhf wrote:
the battery start with Design capacity 44,000wWh... And the actual full charge capacity seems to linger around 37000mWh. Is there something wrong or is my battery just wear out naturally?
Full charge capacity will decline with battery age and number of recharge cycles. Lenovo warrants their batteries for 1 year. IIRC if the full charge capacity drops below 80% of design capacity in the first year you are eligible for a new battery. 80% of 44,000mWh is ~35,000mWh. I would keep an eye on full charge capacity over the remaining 5 months of your warranty.

Battery capacity, rapid drop???

Hi everyone.
I have a 2010 Macbook Air 13".
Every once in a while I check the battery capacity through Coconut battery and through System Profiler (coconut battery always reports the same numbers).
For the longest time the battery capacity (not the current charge, but the actual capacity of the battery) sat around 99% of it's original amount. (Design capacity is 6700 mAh).
However, in the space of 2 incomplete charges (ie. charging from say 40% to 100%) over about 3 days, the capacity of the battery dropped to 96% and then to 93%. (Current capacity 6262 mAh).
This battery is supposed to still have 80% of its capacity after 1000 charge cycles and it is now down to 93% and I have 66 load cycles on the battery (the system is mainly used plugged in, but I make sure to use it off the charger a few times a month to keep the electrons moving).
What could be causing this? Should I just take the laptop in to have Apple check it? Or could the system be somehow mis-reporting the capacity of the battery. I don't think I should have already lost almost 10% of the battery capacity in a little over 6 months of owning it and less than 100 full charges of the battery.
It seems a bit odd to me for the battery capacity to be stable for months and then to drop so rapidly in the space of a few days.
Thanks everyone!

Lithium Ion battery behavior varies up and down from day to day. The design capacity is never actually realized in a consumer product due to manufacturing tolerances.
The life of a Li-Ion battery is usually considered to be 80% of capacity, but that does not mean the battery will fail at the point but that is just a number for determining charge/use time that is reasonable for most users.
Li-Ion battery life cycles vary from 350-1,000 full charge cycles. If you discharge to 50% and recharge fully, that is 1/2 charge cycle.
The recommendation for occasional full discharge, not actually FULL discharge but to the point the unit shuts down, and then fully recharging before use is to condition the charge reporting circuitry built into the battery itself. It does not actually condition the battery like it did in the old Ni-Cad battery days. If you click on the apple in the upper left corner, About This Mac, More Info, System Report, Power and the battery information look at the Condition...if it does not say Normal there may be a problem. You will also see the number of charge cycles, and the charge remaining and Capacity...the ratito of the two should be close to the reported charge remaining in the upper right portion of your screen.
Your battery does not really sound like it is bad...but see what the system report says about the Condition...if it is Normal, Apple is not very likely to do anything about it.

Battery capacity went down, overnight

So i bought my MBP Nov 06, and since then it has been working great. Then about half a year ago i would find that the battery, when discharged completely, and then charged back up, would have significantly less max capacity then it did the day before. I would then use the computer for a while, not on AC power, and the max capacity would jump back up to 99% or so, as stated in coconut battery but it can easily be calculated by dividing my current capacity from 5500mAh, from anywhere between 60% and 80%. I didn't think of it too much, but then a few weeks ago, it did it again, but now it is not going back up to the max capacity. It is staying at 67%-68%. The battery only has 74 load cycles on it, and it has been at 99% for about a year, since i don't use it on battery that much. I found this:
http://www.apple.com/support/macbook...batteryupdate/
However it looks like it only extends the warranty of the battery on CD MBP, not the C2D. But this shouldn't matter, my battery is terrible, and i just noticed last night that it was charging for five hours. I thought it would have finished, but it just kept going, and was down to 47% max capacity. Then i left it in sleep mode, and it used 10% battery, and went back up to 67% this morning. Any suggestions, otherwise over christmas break i'll bring it to an Apple store.
Here are the details:
Full Charge Capacity (mAh): 3739
Remaining Capacity (mAh): 3722
Amperage (mA): 196
Voltage (mV): 12632
Cycle Count: 74
Thanks
Message was edited by: silbeej
Message was edited by: silbeej

They certainly haven't charged me. The on-line instructions said you'd need to take the machine into an authorised dealer or such, fairly inconvenient from where I live, but I just phoned the number given for UK service (see http://www.apple.com/support/contact/phone_contacts.html for worldwide contact details) and described the problem. I started by saying that the MBP was certainly out of warranty but that I believed the battery failure fell within their extended warranty period as described on their web site. I'd got full details ready - serial numbers of the MBP and of the battery and all the information about the battery from System Profiler - which was really all a dealer could have checked. They agreed to send me a new battery for free and a pre-paid label for returning the old one: they wanted credit card details and, not unreasonably, will charge me if I don't return it. I got a couple of helpful emails from the guy I spoke to (in one of Apple's Indian call centres) withing two minutes of putting the phone down and an order reference quickly followed by a dispatch notification within ten minutes. I've been critical of Apple's service before, but this was exemplary.
It was pretty clear that my problem fitted into one of the categories listed in the url I gave in the previous post and I'm not sure that yours does, but it can't do any harm to ask.

MacBook Pro battery capacity dropped to 2%?!?!?!

Hi Everyone
I've recently noticed my battery capacity has dropped DRAMATICALLY in the past month. It's the 2.0GHz quad-core i7 15 inch MacBook Pro, early 2011 model. It is 15 months old, however I bought it brand new (box not even opened) from an eBay seller on 16th June 2011. I always keep it plugged in and very rarely take it off the charge, only if I want to go and work in another room but don't want to bring the adaptor. I know that's not technically good for the battery but it can hardly be *terrible* can it?
I've noticed that the battery was getting very low and after reading a forum post somewhere I downloaded coconutBattery. A few weeks ago, it read that my battery capacity was 68%, which to me sounded pretty low. Then about a week ago I looked again and it read 37% and I knew something was definitely wrong. I check today and it's dropped to 2%!!!!! I would certainly expect some loss of capacity but surely not this so quickly?
I use the laptop on a desk with "cool balls" underneath to lift it up and provide it with a bit of ventillation to keep it from getting to hot. The magsafe charger has a small tear just under the aluminium head which I covered with black insulation tape as soon as I saw it. Would this be the reason the battery is dying so quickly?
I'm thinking I'm going to have to buy a new battery at some point but I don't want to spend £100 on one if it's just going to happen again!
Thanks
ps. here's a screenshot of the coconutBattery window

Yes, you have to pay full price for it when purchsing it from Apple....
There are third party suppliers out there if you wish to buy cheaper ones but I'm not sure if they perform as good as the apple supplied battery...
good luck

MacBook Pro Mid 2010 Battery Capacity

I've read a few threads about this, mostly about battery capacity rapidly dropping after an install of ML. I installed ML when it first came out, and just noticed the drastic decrease in battery life about 3 weeks ago. My capacity could have potentially been dropping since I installed ML (and I just now noticed it), or it may have just started a couple weeks ago when I noticed. I'm not sure.
Either way, my MacBook Pro (Mid 2010) now has a battery life of less than an hour, even with extremely light processor load. I contacted Apple about this, and the tech said that the battery was rated for 1000 cycles. I'm currently at 220, and my battery capacity is a pathetic 30%. He said that since I wasn't under warranty, there was nothing they could do besides replace the battery - which I really want to avoid since I'm a broke college student.
Is there anything I can do here? I understand that I'm not under warranty anymore, and this wouldn't be a problem if my battery was degrading normally. However, getting 1/5th of the recommended battery life is pretty sad. I've read that doing a clean install of Mountain Lion/Lion might help. Is there a way I can do this without having to back up all my files? I don't have an external hard drive or anything.
It seems this is a common topic in these forums. Any help or links to solutions would be great. If this is answered in a similar topic, I'll gladly delete.
Here is the system info on my battery, incase that might help:
Battery Information:
Model Information:
Serial Number:          9G030040MD3MA
Manufacturer:          DP
Device Name:          bq20z451
Pack Lot Code:          0
PCB Lot Code:          0
Firmware Version:          201
Hardware Revision:          2
Cell Revision:          158
Charge Information:
Charge Remaining (mAh):          1453
Fully Charged:          No
Charging:          Yes
Full Charge Capacity (mAh):          1939
Health Information:
Cycle Count:          220
Condition:          Service Battery
Battery Installed:          Yes
Amperage (mA):          1507
Voltage (mV):          12214
System Power Settings:
AC Power:
System Sleep Timer (Minutes):          0
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          15
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Wake on LAN:          Yes
Current Power Source:          Yes
Display Sleep Uses Dim:          Yes
PrioritizeNetworkReachabilityOverSleep:          0
Battery Power:
System Sleep Timer (Minutes):          15
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          10
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Display Sleep Uses Dim:          Yes
Reduce Brightness:          Yes
Hardware Configuration:
UPS Installed:          No
AC Charger Information:
Connected:          Yes
ID:          0x0100
Wattage (W):          60
Revision:          0x0000
Family:          0x0085
Serial Number:          0x00cb7bc3
Charging:          Yes
Thanks in advance

Condition:
     Service Battery
You need a new battery.

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

Battery capacity dropping and changing constantly?

I recently purchased a MBP 13" a few days ago and downloaded coconut battery to check my battery capacity and it seems to fluctuate a bit. It has been approximately 5 days since I began using the computer. I haven't been keeping the display on the highest brightness (do sometimes, but only when plugged into the charger at home) and keep other power saver settings on but the battery is still at about 5570 mAh, is this good or bad? Coconut battery says this is approximately 96% of the designed 5770 capacity. It dropped down to 5536 just yesterday and has risen back to 5576 as of this post. Is this normal because my computer is so new and it can't exactly calculate how much it has, or am I draining the battery that heavily?
I use it for school daily, and return home with approximately a 35-50% charge (depending upon usage during the school day), and begin charging when it reaches approximately 20%. Should I be charging earlier than this? I know not to let it drop to critical levels such as 10%, but not sure when I should exactly start charing to maximize this batteries lifespan. Thank you for whomever answers!

The small fluctuations you're seeing in your battery's Full Charge Capacity are entirely normal and will continue, perhaps lessening somewhat as time passes. I still see fluctuations (up as well as down) of 2-3% in my two-year-old battery's capacity, though of course the overall trend is gradually downward. It began at 4805mAh (103% of its design capacity of 4650) right out of the box, and it has been reported as low as 4320. It's now at 4530 after 137 cycles (this battery is rated for 300 cycles, unlike yours which is rated for 1000). I don't check it but every couple of months, so it could very well have gone outside that range at times without my noticing. I suspect that part of the reported variation is due to calibration error (I occasionally go longer than I should between calibrations) and part is due to limited precision in the measurement. I just don't worry about it at all, and I recommend that you don't either.

My battery capacity decreases per charge!!!

Hi guys I need help, I am very frustrated about this matter , This is my first macbook pro retine late 2013 the latest one out yet 4gb ram baseline model with the dubal core i5. I started playing LOL or League of Legends an online game a few weeks back.
When I did start I was completely hooked and played multiple hours even with the battery charger plugged in. The battery lost its total capacity from 6300 its about 6200 then it fell 6150 ok then I statred carying ok I LOVE MY MAC AND ITS BATTERY.
So i went like ok i will play max 40 mins per day, fine huh 1 time per charge cycle make sure the charge cycle is 20 hrs long I have been trying to do this more or less BUT EVEYTIME I PLAY THE GAME EVEN IF THE CHARGE drop is only 30% my total battery capacity drops.
I am checking this through MULTIPLE apps and every time i play the drop is bloody 0.5 percent and i CANT TAKE IT and when i dont play on a chrge cycle there is NO DROP IN THE OVERALL capacity.
Note i take soo much care when i pay i charge it to 100 and keep it ice cold when i play and its not plugged in. Any advice are the apps wrong is my capacity decresing are macs not meant for gaming or if i conture down this path will i have to eventully replace my battery just any adivce or thoughts on this matter will be VERY APPRECIATED!!!

When Taxing the system, Running it Hard as most all games do, it will draw power from both the AC charger and the battery at the same time.
The AC charger Apple supplies is not large enough to do both Power the system and charge the battery, or even keep the same charge on the battery, when the system is working hard.
As to the overall capacity of the battery that will go down with the increase of charge cycles.
What you are seeing is completely normal for all Mac notebook computers.

How to INCREASE Battery Capacity

Just drop the advertising - I know that battery capacity varies, and that the capacity of the phone battery - regardless of models, will degrade as the phone is used.
I contest the "specialists" to provide some straight simple guidelines to how one can treat a battery to increase the capacity.
That the layers gets closer and short-curcuits is a known reason. So, exposure to heat will make the substance that keep the layers apart into gas that escapes the battery. Now how can such a battery be fixed? In old days with NiCd we could freeze the battery to -36C, that would make the iodine to solid. if iodine is still used, this will still work. Other semiconductors needed more than -100C to regain state - but with access to liquid Nitrogen, that was fully possible. Maybe Ni is not so common, but freon is, and LPG (Butane/Propane liquified). A home freezer can at times go as low as -38C.
So, can charging in heat / cold change the capacity of the battery?
Other: If I completely drain the battery between every charge - will that improve it?
If I start to recharge it when it is 80% of capacity, and disconnect immediately and use everything, Bluetooth, WLAN - to drain it to 80% and the recharge - can I restore the good old capacity?
if the battery degrades to 10% of capacity, is it possible to restore it? How?
Don't change anything that works.

That, and I've been reading to not constantly charge it, or leave it in at 100%. It can be charged too much from what I've seen. I've had mine since 2006 almost 2 years, and till recently left it charging all the time. Not sure that's been a good idea. This is Battery University website information...
gure 1: Permanent capacity loss of lithium-ion as a function of temperature and charge level.
High charge levels and elevated temperatures hasten permanent capacity loss. Improvements in chemistry have increased the storage performance of lithium-ion batteries.
The mentioning of limited service life on lithium-ion has caused concern in the battery industry and I will need to add some clarifications. Let me explain:
If someone asks how long we humans live, we would soon find out that the longevity varies according to life style and living conditions that exist in different countries. Similar conditions exist with the batteries, lithium-ion in particular. Since BatteryUniversity bases its information on the feedback from users as opposed to scientific information derived from a research lab, longevity results may differ from manufacturer' specifications. Let's briefly look at the various living conditions of the lithium-ion battery.
The worst condition is keeping a fully charged battery at elevated temperatures, which is the case with running laptop batteries. If used on main power, the battery inside a laptop will only last for 12-18 months. I must hasten to explain that the pack does not die suddenly but begins with reduced run-times.
The voltage level to which the cells are charged also plays an important role to longevity. For safety reasons, most lithium-ion cannot exceed 4.20 volts per cell. While a higher voltage boosts capacity, the disadvantage is lower cycle life. Figure 2 shows the cycle life as a function of charge voltage.

IPad Mini: battery capacity inconsistent

I notice that even if only down to 90% battery capacity, if I leave my iPad Mini (64g Verizon) plugged into my computer overnight, it will only charge up to about 98% or 99%. Also, the iPad itself my display 98% but when synced with iTunes, iTunes may show it at 99%. I've numerous iPads over the past couple of years and this is the first time I've seen this inconsistent behavior. I'm running 6.0.2 and I've done a complete device reset several times.
Am I missing something?
Thanks in advance!

By the way, the mini is only a week old and has been exhibiting this behavior since day 1.

New Mac's battery charge percentage drop quick using AC adaptor 24/7, should I be worried?

I use my mac with AC adaptor 24/7, but the battery capacity drop 4% in 3 days... should I be worried? Is it some kind of hardware problem?

Hi,
Well, it's only England, so no extreme temperatures, but I can see my breath in the morning when the heater hasn't been on! I didn't think it would be too cold, but seeing some other posts wondered if that could be a contributing factor, being the unusually cold weather here over the past two/three weeks.
I'm just panicking in case my battery or charger is about to go, just when I really need them.
I'll calibrate the battery -- which is something I wasn't aware of until reading this forum today.
The problem is, I'm traveling to the Caribbean to the opposite temperature problems may arise -- to hot and humid. I think I'll buy an extra battery to be on the safe side.
At least neither of you has said: 'oh dear, that sounds like a failing battery.' So I'm a little less panicked now. I'll keep an eye on it and post back if anything dire happens over the next few days.
Thanks for taking the time to respond.
Cheers,
Tracy

Battery capacity rising on MBPr 13"

I've noticed something very strange on my 3-month old MBPr 13" (late 2012 model).
In order to monitor my battery, I'm using the coconutBattery program. A week or two earlier, the maximum capacity was something along the lines of 98.* - 99.* %. Now, it shows that the "design capacity" is over 100%!
Here's the screenshot:
When I first bought the computer, the battery reported 101%. Then, it went down to 98.* % and now it's rising up again. What does this mean? Do I have a malfunctioning battery? Is it dangerous?
As a sidenote, one day my Macbook became really cold and I saw some very minor condensation on it when I came back home. Obviously, I didn't turn my computer on in order to prevent damage to its inner components and left it turned off overnight. Could these temperature changes have caused this sudden change of capacity? Or are such fluctuations normal?

My battery capacity keeps rising, it now shows 6714 mAh. Is it really normal?

Battery capacity after 200 load cycles - what is normal?

My battery capacity has been fairly steady at around 92%(5100 mAh) between cycles 125 and 200. I baby it and always use a cool pod to prevent overheating. Then, within 3 charge cycles, it dropped to around 4500-4600 mAh (82-84%). Apple care told me that their engineers consider this capacity as normal. Upon asking what would be considered as not normal, I was told Apple would not release this information. But it is general knowledge that Apple guarantees 80% after 300 cycles. Good luck if my battery will last that long at that level. After another 10 cycles, the battery is still at that 82% plus level.
I am concerned about this sudden drop: is it the microchip on the battery, that is going?
Message was edited by: Jürgen Kraus

I've never heard, nor read that Apple "guarantees" anything like what you say. Apple claims:
"Battery Lifespan
For Apple notebooks with removable batteries — such as previous generation MacBook and MacBook Pro computers — a properly maintained battery is designed to retain up to 80% of its original capacity at 300 full charge and discharge cycles. You may choose to replace your battery when it no longer holds sufficient charge to meet your needs."
There is not guarantee mentioned or implied in that statement. Whether any particular battery still has 80% life at 300 cycles is anyone's guess. It depends entirely on the manner in which it was used, operating temperatures it was subjected to and so on.
IMO, if you are over 200 cycles and you are starting to feel that the battery is not holding sufficient charge for your needs, it's time to shop for a new one. Batteries are a consumable item - they will fail with enough time and use - that much is guaranteed. It is a function of unavoidable internal oxidation and degradation of chemical components, not of the "smart" battery control circuitry.

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.

Battery Capacity dramatic drop overnight

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