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.

Similar Messages

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 suddenly fell down

well, I have used mine about 6 month. until I using battery today, it has been kept around 5184 ~ 5136. but it suddenly fell down to 4184. I don't know exactly why this is happened. I don't think battery is defective. my battery has only 24 reclycles. for the number, capacity dropping is not normal. have anyone experienced the same thing?

actually, what I posted '4184' is not correct. it was 4814. anyway, yesterday it was kind of surprised to me when I used battery mode. then recharged it again. it's now 4995. it's increased again. I don't know how this is happened. just within few days, it's dropped to 300, and gained 180?

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

IPhone 4 Battery life suddenly dropped by half

Hi Everyone,
I have a 3 month old iPhone 4 running IOS 4.2.1 since it became available. The battery had been performing fine till 2 days ago. Now I start out with it fully charged in the morning and the battery had died at 2pm in the afternoon when all I've done is make a few minutes of phone calls and sent a few texts. Anyone have any ideas on what i can do about it?

Hi zzzaaazzz,
The same thing happened to my 4-months-old iPhone 4 running the same iOS version as yours. The fast battery drain was only one of the symptoms in my case. I also noticed that the responsiveness of the phone became slower and slower. I turned off the location service, push notification, even Wi-Fi and the battery still drained and the UI still very slow. I noticed that the phone was trying to connect on the network (the circular rotating icon next to the AT&T bar at the top left corner) almost constantly (with a few seconds break here and there). I took the phone to a local Apple Store's Genius Bar and they diagnosed that the network connector service on the phone is crashing, restarting, and crashing. The best way to resolve is to restore as a new phone, and not to restore with the old data. In deed they were right. I tried restoring as a new phone and then restored my old data which restored the same problem as well. So, it took me some time but I restored the phone as new then manually re-loaded all apps, music, video, and configured mail accounts, etc. The problem has gone away after this. I still don't know which app caused it, but all apps are working now. Hope this helps.

Battery life sudden drop off!

Hi all i have had my iphone4 for about 3 months with no problems at all! in fact it been great. But i charged it up last night as normal and went out for the day and notice that the battery was going flat very fast?
I was not useing the phone at all as i was busy and only check it for emails ect nothing unnormal.
I went out at 10.30 and it was flat by 4pm and i mean dead!I charged it again and its now been off charge for 2hrs and is at 60% already.
I had a 3gs before this (my wife has it now) and it is still as good as new and thats a year old or more.
Has the battery had it? if so why?
PLEASE HELP LOL
Regards
Andy

I have a similar symptom to the original post, and have tried the reboot suggestions, but they didn't work. I have had the phone for a month or so, replacing a 2G, and initially battery life was about the same. The battery will not last even for a day. When I went to bed last night, the phone had 70% charge and it was completely dead by the morning today.
To diagnose a separate issue (data use increased 5x to 10x on both my phone and my wife's 3G iPhone after changing to the 200MB/mo plan), I started shutting down potential data users: no push, no fetch, no notifications, made sure apps were not running in the background, etc. It doesn't seem to make sense, but I would say that battery life got worse.
My question: is there any utility or available to check or log what's going on in the phone?
Thanks!

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

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 drop in iBook g4 battery life?

My wife's iBook G4 maintained a truly stellar battery performance from purchase to sometime last week, regularly delivering between 3 and 4 hours per charge. Sometime last week, that changed very suddenly and dramatically to just over 30 minutes.
While gradually declining battery life is the norm, such a precipitous decline makes me very strongly suspect that the battery is still holding a charge in line with the battery's track record and that the low-charge message is some sort of bug.
Is there any record of such an issue, how do I verify or dismiss my suspicions, and what might account for a sudden loss of over three hours of charge time?

Hi Mike,
Difficult to say without knowing how old your wife's iBook is and how many charge cycles the battery has done. As I understand it, the loss of battery capacity due to age/charging cycles is non linear and that capacity can drop dramatically and suddenly after 2-3 yrs/300-500 charge cycles.
(Very vague, I know. Such is the nature of the beast.)
You have omitted to mention which OS is relevant but if your wife's iBook is running 10.4 the battery info can be obtained via the Apple menu>About this Mac>More info, then scroll down to Power.
If the OS is 10.3.x then open Terminal in Applications>Utilities and enter:
ioreg -w0 -l|grep Capacity
and press return. (Works in 10.4 too…)
Either way, copy and paste the info into a reply here and someone will be able to give a more informed opinion.
Adrian

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.

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.

Battery capacity at 386%

My battery has suddenly started over stating it capacity so I now get monitors saying I have 9.5hr of usage(I wish !).
Another monitoring software says it is at 386% of capacity.
I have reset the PMU but no change.
Any suggestions ???
G4 17" Powerbook Mac OS X (10.3.9) 1.5Tb of Firewire Drives

Unfortunately, the number of cycles is an indicator, but isn't totally reliable to tell battery condition. If, for example, one left their PB plugged in all the time, and didn't deep discharge it monthly, as recommended in this Apple article: http://www.apple.com/batteries/notebooks.html , you could have a lower cycle count and a failing battery.
If it also forces sleep at 93%, that's another sign that the battery may not be long for this world. Failing lithium batteries often have a sudden, unexpected drop off in capacity.

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.

T430s Battery Leaking???

Hi all,
Sorry to bother this forum again about my T430s. But I recently find a weird issue related to the battery T81+ and Ultrabay 3 cell battery. I find my battery is leaking power!!! For example, after the battery is fully charged, I keep my AC power connected so the battery shouldn't be used. However, after almost one day, the battery goes down to 99% and two days past, it keep going down to 98%. I thought that maybe I make it too full, so I used battery for minutes to get it down to 78%. However, after a daytime, the battery goes down to 77%. Same thing happened to my Ultrabay 3 cell battery.
Another problem is that, I found the capacity of my T81+ battery is going down. The initial battery capacity is 44.3Whr, but after 8 cycle times, the capacity drops to 43.7Whr, which I consider it as quite "fast drop". Because I used several previous Thinkpad, X200, X201, I know how to maintain the battery to be perfect status. These battery capacities drop only 1Whr after almost 70+ cycles charge and recharge. So, I don't know why this happened to my T430s.
Any solution? After considering other issues I mentioned before, I really considering get my T430s replaced with a new one... http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T430s-2352-volume-button-not-working-someti...
http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T430s-2352-Blue-Screen-and-Stop-Code-101-Is...
Solved!
Go to Solution.

hi.
while 1% battery drain per day is nothing to worry about, the drop in design capacity to your current full-charge capacity shouldn't occur with just 8 cycles. as reference, i'm responding on a 5 year-old t60p, with a 3.5 year-old 9-cell battery that has 205 cycles on it. my design capacity is 84 Wh and my current full-charge capacity is 70Wh. So about a 16% drop in 3.5 years. this battery will likely last me longer than i'll use the pc.
a couple questions for you...
how far down do you drain your battery while using the pc before recharging?
what are your battery charging settings in power manager?
for reference, i've got power manager set to not charge the battery until the charge goes below 40%, and then to charge it to 100%. there are internet references (i'll post a link when i find it) that suggest you should never drain a li-ion battery below about 20%, except for very rarely to reset a battery gauge or such. the reference also suggests that 40% charge and cool are optimal conditions for long-term storage of li-ion batteries.
cheers!
English Community Deutsche Community Comunidad en Español Русскоязычное Сообщество
Community Resources: Participation Rules • Images in posts • Search (Advanced) • Private Messaging
PM requests for individual support are not answered. If a post solves your issue, please mark it so.
X1C3 Helix X220 X301 X200T T61p T60p Y3P • T520 T420 T510 T400 R400 T61 Y2P Y13
I am not a Lenovo employee.

T430s battery capacity sudden drop

Similar Messages

Maybe you are looking for