Battery charge percentage diminishes when connected to mains?

Hello,
I am not sure if I am right or wrong but I think there might be something strange with my Macbook Air.
(11", core i7, 250ssd, 4gb ram).
Every time the laptop is connected to the mains, the battery percentage starts dropping.
For example, last night the laptop was fully charged to 100%. After that, I shut down the system, I waited till it was shut down completely and after that I unplugged the cable as well (It was not in sleep mode).
Now in the morning when I plugged back the cable to the mains, I turned it on, and voila, it is was on 99%.
Am I doing something wrong? It is happening all the time, till the point that the battery drops up to 94% and starts charging again up to 100%.

CranberryJuice wrote:
But why would it need the power from the battery to start up? If it's connected to the power outlet?
The % drops even when connected all the time to the power outlet.
Thanks
The power adapter can not supply the power required when the processor is under a heavy load. It gets the difference from the battery. That is why the the older versions of the MacBook Pro dropped to half speed if they were run with the battery removed. An MBA battery is not removeable but the same underpowered power supply problem exists. It is a notebook that is intended to be operated from the battery. It is not a desktop replacement.
The power supply was designed to charge the battery. It would have to be larger (more expensive?) to charge the battery and also run the cpu at full load.

Similar Messages

HT1414 did anyone notice when you updated to is06 you lost the battery charge percentage? can yu get it back?

did anyone notice when you updated to is06 you lost battery charge percentage? ho do you get it back? ty jmcapo

Ack! We don't need that much.
What you posted looks like the iTunes Library.xml file I will let you read about how iTunes works but not only is the .xml not your main library it is just the listing of tracks in your library and where the music files should be located. Your music is actually in media files (by the way, it is pointless to zip those as they are already compressed). Anyway, read these and you will see that your true library file (iTunes Library.itl) is only a small, but still important, part of a complete library.
What are the iTunes library files? - http://support.apple.com/kb/HT1660
More on iTunes library files and what they do - http://en.wikipedia.org/wiki/ITunes#Media_management
What are all those iTunes files? - http://www.macworld.com/article/139974/2009/04/itunes_files.html
Where are my iTunes files located? - http://support.apple.com/kb/ht1391
As you can see, a library has several components, so "getting it back" depends upon what is missing, what it was you actually backed up in the end, if any of this music was purchased from the iTunes Store, etc.

Satellite A500 - Battery light flashes when connected to mains power

Win 7 Satellite A500 PSAM3A-03P00E.
The battery light flashes when connected to mains power (intermittent fault), when I unplug mains and re-connect flashing stops and battery (high capacity) continues to charge.
Also when battery light flashes the key board back lighting stays on when it should blank out and if the back lighting is off and the battery light starts flashing the key board back lighting doesn't turn on, all other functions seem to work fine.
The battery charges and holds charge as it should (when light flashes battery doesn't charge).

Hi
Did you notice this issue from first day of purchase?
Theoretically it could be possible that your battery starts to malfunction
At the other hand an electronic issue might be possible too
However, try this:
Remove ac adaptor and battery. Then press and hold power buttons 30 sec long.
Then insert the battery and connect AC adaptor again does it helps?
By the way: is BIOS up to date? If not, perform an update.

Battery light flashes when connected to mains, (intermittent fault) battery in good condition.

Win 7 Satellite A500 PSAM3A-03P00E. The battery light flashes when connected to mains power (intermittent fault), when I unplug mains and re-connect flashing stops and battery (high capacity) continues to charge. Also when battery light flashes the key board back lighting stays on when it should blank out and if the back lighting is off and the battery light starts flashing the key board back lighting doesn't turn on, all other functions seem to work fine. The battery charges and holds charge as it should (when light flashes battery doesn't charge).
Solved!
Go to Solution.

All fixed, the earth contact in the power jack was bent down allowing intermittent contact and limiting current. I bent the contact back up to where it should be and all is good.

How to check NWZ-WS615 battery charge percentage for mac OS X?

Hello,How can I check the battery charge percentage of my NWZ-WS615 in mac osx ? Regards

Hi tianfu88,
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Thanks,
>Joffrey
If my post answers your question, please mark it as "Accept as Solution"

Are there any iPod Speakers that do NOT charge your iPod when connected?

Hi there,
I'm looking for an affordable iPod speaker that does not charge or gives you the option of not having your iPod charge.
I know people who keep attaching their iPod to the dock speakers that they have, and it constantly keeps charging and that literally killed the battery on their iPod's.
I know there is the Logitech MM32 (connects through headset jack), but not sure if that is compatible with the new Nano 3rd Generation.
Does anyone know of any other speakers that does not charge your iPod while connected (when connected to the wall outlet -> AC) or gives you the iPod not to charge the iPod?
Thanks in advance!

Constantly charging does NOT kill the iPod battery, it is a myth.
Once the battery is charged the main charging stops and it is switched to 'trickle' charge which means it get a slight charge every so often.
There is not problem at all in keeping the iPod topped up, just make sure you discharge it fully approx once a month as per Apple's instructions here :-
http://www.apple.com/batteries/ipods.html
And general battery advice here :-
http://www.apple.com/batteries/
The key is the number of full charge cycles you o through, if you only ever keep topping up the battery then you will not go through full charge cycles very quickly. If you only ever top up the last 5% of the battery then you can do this 20 times and it will only count as 1 charge cycle. Based on the 400 they say you can get from a battery before the capacity drops to 80% that would mean you could top up the battery that last 5% over 400*20=8,000 times.
Ian

My iphone is currently using battery life much more quickly than inthe past, and it also has an icon tht is starying on the screen, to the left of the battery charge percentage, that looks like a lock with a circle around it

i have an iphone that is using battery life much more quickly than in the past, a full charge is going to zero in a half a day or so, with out much use.
an icon is also appearing next to the charge percentage in the top right, and the icon is a circle around a lock
can anyone tell me what the problem is, and what the icon means?

The Icon meas your display orientation is locked to vertical so it wont change when you turn the phone sideways.
First thing you should check with the battery life is multitasking, which also happens to be where the orientation lock can be turned off. check out http://support.apple.com/kb/HT4211 and go from there

Battery charge dropping even when plugged in on Satellite series

I've got a satellite laptop and even though it recognises the power adaptor when plugged in, and the icon in the task bar states 'charging', the percentage of the battery charge appears to be dropping.
This is only whilst the laptop is on, as it does seem to charge the battery when switched off.
I didn't think it used any battery power whilst plugged in, so I'm confused as to not only why the battery doesn't seem to be charging, but also why the battery charge appears to be dropping when the laptop shouldn't be using it anyway.
Any help appreciated!

Hi there,
i have seen this problem on my own laptops in the past. even if the laptop is charging, the battery does seem to be dropping in charge.
This indicates that the life of the battery is approaching its end, as there are a limited number of charge cycles for a battery before it eventually dies.
Also when you have the computer turned off charge is still being lost at a considerable rate, as the battery is well, 'dying'.
You cannot do anything about this except to buy a new replacement battery for your laptop from an authorised Toshiba repair centre. this should answer your question.

My iPhone 3G charges with a charger, but not when connected via USB to my computer and iTunes doesn't recognize it.

Hello, my iPhone charges when I charge it with the wall plug but not when connected to a computer via USB and my iTunes doesn't recognize my iPhone either. iTunes recognizes my iPod and iPad just fine. I have been to Apple iPhone support page and I have restarted my iPhone, the computer, tried different USB ports, etc. I have also tried my iPhone on different macs even with different versions of iTunes and no luck. This all started when I was cleaning out some lint from the usb connector, could I have damaged some part of the docking connection? But why does it charge with a wall plug then?

I fixed the problem. When I was trying to clean the connector of the iPhone I must have bent some pins. I have straightened them to the best of my ability and now it syncs. If your iPhone charges, but doesn't sync, most likely you have a similar problem, because the iPhone doesn't need all of its pins to charge, but it does need all of them to sync.

[SOLVED] Battery charge percentage reports as 0% in xmobar

I have an ASUS U36JC laptop running Arch. I'm using xmobar to display information about the battery charge.
The estimated remaining lifetime in hours reports correctly, but the charge percentage always reports at 0%.
The charge level is reported correctly by acpi:
$ acpi
Battery 0: Discharging, 69%, 03:24:48 remaining
Listing /sys/class/power_supply/BAT0 gives:
$ ls /sys/class/power_supply/BAT0
alarm device energy_full_design manufacturer power present status technology uevent voltage_now
cycle_count energy_full energy_now model_name power_now serial_number subsystem type voltage_min_design
The contents of uevent are:
$ cat uevent
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=14880000
POWER_SUPPLY_VOLTAGE_NOW=15529000
POWER_SUPPLY_POWER_NOW=16335000
POWER_SUPPLY_ENERGY_FULL_DESIGN=84000000
POWER_SUPPLY_ENERGY_FULL=81750000
POWER_SUPPLY_ENERGY_NOW=54600000
POWER_SUPPLY_MODEL_NAME=U36--56
POWER_SUPPLY_MANUFACTURER=ASUSTek
POWER_SUPPLY_SERIAL_NUMBER=
And my xmobarrc is:
Config { font = "-misc-fixed-*-*-*-*-10-*-*-*-*-*-*-*"
, bgColor = "black"
, fgColor = "grey"
, position = Top
, lowerOnStart = True
, commands = [ Run Network "eth0" ["-L","0","-H","32","-n","green","-h","red"] 10
, Run Cpu ["-L","3","-H","50","-n","green","-h","red"] 10
, Run CpuFreq ["-t","<cpu0>"] 10
, Run Battery ["-t","<left>% / <timeleft>","-L","50","-H","75","-h","green","-n","yell","-l","red"] 10
, Run ThermalZone 0 ["-t","<temp> C","-L","40","-H","79","-h","red","-n","yellow","-l","green"] 10
, Run Memory ["-t","<usedratio>%"] 10
, Run Swap ["-t","<usedratio>%"] 10
, Run Date "%a %_d/%m %H:%M" "date" 10
, Run StdinReader
, sepChar = "%"
, alignSep = "}{"
, template = "%StdinReader% }{ %cpu% / %cpufreq% | M %memory% * S %swap% | %eth0% | %battery% ; %thermal0% | <fc=#ee9a00>%date%</fc>"
Thanks,
Last edited by maw09 (2012-02-08 05:29:47)

maw09 wrote:
Listing /sys/class/power_supply/BAT0 gives:
$ ls /sys/class/power_supply/BAT0
alarm device energy_full_design manufacturer power present status technology uevent voltage_now
cycle_count energy_full energy_now model_name power_now serial_number subsystem type voltage_min_design
Try adding -c "energy_full" to the battery plugin args.
You can also add -f "/sys/class/power_supply/AC0/online" if you don't have proper AC status in xmobar.
http://projects.haskell.org/xmobar/#sys … or-plugins

Slight Buzz/Hum When Connected To Mains Adaptor

My MacBook is making a slight buzz/hum at the top left of the keyboard (by the esc key) when connected to the mains adaptor. It seems to be in the area of where there the magsafe connector is. Assume its the power 'board' or whatever its called making the noise.
The buzz seems to come and go, especially when the hard disk is accessed.
Just wondered if anyone ekse has experienced this or if I should be raising a support call as the MacBook is only a month old.
Regards
NIALL 8-)

I believe it's a CPU whine you're refering to. Try
opeining Photo Booth and see if the noise stops.
The noise is still there.
I've reset the SMC as well.
The noise is only slightly noticeable and ONLY there with the power adptor connected.
Regards
NIALL 8-)

Playbook won't run on battery. Only runs when connected to charger.

My playbook battery shows 100% charge, but immediately shuts off when I unplug the charger. When I plug it in it will boot up after red light comes on then flashing green fifteen times and work properly, until I disconnect the playbook charger. I also cannot connect it to my computer anymore.
Unable to find a solution to this exact problem. Any suggestions are appreciated.

First I would like you to do a Back Up of your PlayBook using your computer and BlackBerry Desktop Software.
This can be downloaded for free from http://us.blackberry.com/apps-software/desktop/
After the Back Up is complete I need you to unplug your PlayBook and then push and hold down the Power Button until the unit Force Powers Off.
Now, while Desktop Software is still open on your computer and the PlayBook Powered Off, Connect the PlayBook to your computer.
You should see and error screen from Desktop Software pop up that has the options to Retry, Update, or Cancel.
QUICKLY choose the Update option.
This will erase all the information off of your PlayBook and Re-Write the Software back onto it. Once it's complete your PlayBook will need to go back through the setup wizard, and you can then perform a restore using Desktop Software to return your information. The only thing that won't come back after the restore are the apps that you downloaded from App World but they can be easily Re-Installed using the My World feature in App World.
Click here to Backup the data on your BlackBerry Device! It's important, and FREE!
Click "Accept as Solution" if your problem is solved. To give thanks, click thumbs up
Click to search the Knowledge Base at BTSC and click to Read The Fabulous Manuals
BESAdmin's, please make a signature with your BES environment info.
SIM Free BlackBerry Unlocking FAQ
Follow me on Twitter @knottyrope
Want to thank me? Buy my KnottyRope App here
BES 12 and BES 5.0.4 with Exchange 2010 and SQL 2012 Hyper V

TS2634 1st gen iPad has suddenly quit showing that it's charging. I found that if it's shut it down and plugged in for 12+ hours, it will charge, but when in use, the battery drains quickly. When connected to the Mac, it doesn't link with iTunes.

Is this a problem that can be easily fixed? I'm guessing it's a problem with the charger connector, possibly??

The quickest way (and really the only way) to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter (5W). When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
How to Calibrate Your Mac, iPhone, or iPad Battery
http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery (25 watt-hours) will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes. The new iPad has a larger capacity battery (42 watt-hours), so using the 10W charger will obviously take longer. If you are using your iPad while charging, it will take even longer. It's best to turn your new iPad OFF and charge over night. Also look at The iPad's charging challenge explained http://www.macworld.com/article/1150356/ipadcharging.html
Also, if you have a 3rd generation iPad, look at
Apple: iPad Battery Nothing to Get Charged Up About
http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
New iPad Takes Much Longer to Charge Than iPad 2
http://www.iphonehacks.com/2012/03/new-ipad-takes-much-longer-to-charge-than-ipa d-2.html
Apple Batteries - iPad http://www.apple.com/batteries/ipad.html
Extend iPad Battery Life (Look at pjl123 comment)
https://discussions.apple.com/thread/3921324?tstart=30
New iPad Slow to Recharge, Barely Charges During Use
http://www.pcworld.com/article/252326/new_ipad_slow_to_recharge_barely_charges_d uring_use.html
Tips About Charging for New iPad 3
http://goodscool-electronics.blogspot.com/2012/04/tips-about-charging-for-new-ip ad-3.html
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
http://thehowto.wikidot.com/prolong-battery-lifespan-for-ipad
 Cheers, Tom

MacBook switches off randomly even when connected to mains without battery

Hey, i've had a MacBook for nearly 16 months now and it's always worked ok but recently every time i switch it on, about 1-5 minutes later it will just die and switch off! If i try to switch it on after this it just keeps dying. The only way to get it on and working again, is to hold down the power button until the sleep light flickers and i here a short continuous beep. After this it works fine although the fan runs for the most time on use. I thought this might be a battery problem but i've removed the battery and just run the macbook from the mains and it still switches off in this first period. If anyone knows the source of the problem or could point me in the direction of a relevant post that could help, it would be much appreciated.
Thanks, Ashley.

I suggest you upgrade your software. Tiger is at 10.4.11 now and a lot of stuff has been fixed since 10.4.06
Reset the SMC (System Management Controller) and/or PRAM (Parameter Random Access Memory). Mac OS X: What's stored in PRAM?

Why won't the data cable charge my iPad when connected to pc

For some reason when I connect my iPad to my pc with the supplied data cable it won't charge the iPad. It syncs ok but just won't charge it.
Is there a reason for this or do I need to get a different cable?
When I connect my iPhone to the pc with data cable from iPad, it charges my iPhone.
I just really need to know why it therefore won't charge my iPad.
The only way I can charge iPad up at the moment is by connecting it to the mains plug with data cable supplied

Bravo Blues#2. I often wonder what happens to some people when wrapped in the blanket of anonymity. Rather than use the faceless forum of an online discussion group to show the best in human nature, so often people become nasty, arrogant, or just plain anti-social.
Thanks for saying something.
On another note, I consistently have a problem charging my iPads with any cable other than the short cable
supplied by Apple. I have purchased over a half dozen ten foot cables and they will charge my iPod and iPhone just fine. I have tried exchanging the cables, the chargers and the iPads. With every charger I reach the same result, I cannot find a ten foot cable that will charge my iPad. I could probably go to Apple and buy a cable from them, but they are SO expensive.
Suggestions? What, other than length, is the difference between the short cables that come with the device and the longer cables I keep getting from eBay?
Thanks much for your help.

Battery charge percentage diminishes when connected to mains?

Similar Messages

Maybe you are looking for