Hardware :: Laptop Battery Discharges Even With A/C Adapter Plugged In
Mar 24, 2011
A couple of days ago, my laptop battery starting discharging at random times. I could rectify this by either pushing the A/C cable in or rotating it slightly. Now the battery discharges unless the A/C cable is pushed in constantly. A few months ago I had a similar problem, though it was accompanied by the computer randomly shutting off. The battery had to be removed and reinserted before I could successfully power the machine back on. Purchasing a new A/C cable fixed this problem quite well. I suspect it may be the battery this time. The gnome battery monitor in LMDE is going completely nuts, announcing I have five minutes of power left and then happily informing me that I have 10 hours 42 minutes only a few moments later.
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Mar 2, 2010
getting back to our laptop, the stability window is ~3.2V. Meaning that when you operate the battery above this the electrolyte is oxidized on the positive electrode and reduced on the negative electrode. Remember that we only want to oxidize and reduce the active materials and don't want to do anything else. All these reactions other than the ones we want are called side reactions and these are really bad for the battery. The nominal voltage of a laptop battery is 3.7 V which means that something bad wants to happen as we use the battery.So long story short, stuff (e.g., passive layers and poor kinetics of reactions) happens and things are not as bad as they seem and you can increase the voltage up to 4.2V without bad things really happening. All chargers for Li-ion cells today cut the battery off when it reaches 4.2V. What you have to realize is that at 4.2V, these side reactions are present in finite amounts and start to chemically kill the battery, but its not that dramatic.
Operating to 4.1V makes things better and extends the life, 4.0 V is even better and so on. So why don't battery manufacturers cut the voltage off at, say, 4 V to get better battery life? Because every time you cut this voltage down you decrease the capacity of the battery and its run time. The 4.2V cutoff is a compromise between good run time and decent (read "not pathetic) life.On the other hand, if you charge the battery and then pull the plug (so to speak), the battery discharges some, the voltage drops, and these reactions become less of a problem and your battery life goes up. So the best things you can do is to charge the laptop (or cell phone, camera etc.) and once its charged, pull the plug. Your battery will thank you for it.As a matter of fact, if you own a Lenovo Thinkpad, you can actually change the state of charge to which you charge the battery using the Battery Maintenance utility. You can change this from charging to 100% state (where the voltage is 4.2V) to 90% so that your voltage is less. You lose some energy is doing that, but atleast you can change it to 100% when you need battery power and put it back down to 90% when you can plug in. I wish my Mac has the same feature.
I typically use the battery for a while (say 1/2 hour to 1 hour), then plug it in and wait to fully charge it, then I pull the plug and use it again for 1/2 hour to 1h and then I repeat this. Takes some getting used to and I forget to do this, but I try.
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May 1, 2010
Just installed 9.10 followed by a 10.04 upgrade (wouldn't work as a 10.04 clean install). The install and upgrade all seemed to go well.
But now when booting I get a message saying "checking battery state" and then it boots no further. This is a laptop without a battery installed, running permanently from the mains through the charger.
How can I disable this check so that the laptop will still boot without a battery fitted?
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Jul 3, 2015
I have a thinkpad e440 with Debian Jessie installed. I use GNOME and thus systemd. Recently the laptop's battery stopped charging when the AC is plugged in. This could be several things, maybe I need to get a new battery (the battery is only a year old). However I need a computer for work, so I tried unplugging the battery and turning on the computer with AC plugged in.
The computer turns on, the grub menu appears, but after I choose the option to boot Debian grub shows the loading ramdisk (or is it the kernel or something like that? The two lines that grub shows after selecting Debian) verbose and then shuts off. When I plug the battery back in, grub is able to boot Debian. As my battery is running out I am not sure whether I will be able to boot when the battery life is zero. Is systemd just looking to make sure the battery is plugged in and then fails when it is not? I suppose I'll find out soon as to whether I can boot without battery life, but the battery plugged in.
With 0% battery I am able to boot into Debian as long as both the AC and the battery are plugged in. Battery still won't charge, but at least I can use my computer.
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Jan 29, 2010
Actually I am using Ubuntu netbook remix in Benq netbook. In that bluetooth is inbuild. When I use this same ubuntu netbook remix as "live usb" this bluetooth works and searches the devices. But after installing ubuntu remix in harddisk I am getting error as "No bluetooth adapter plugged in" I dont know why. So I again checked with the same "live-usb" this time the bluetooth didn't works. Saying the same error which it shows when I boot from hard disk.
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Jan 20, 2010
Powerdevil has been a pain for me for as long as I've use it, since KDE 4.3.1(Even Pre 4.3.1, up to 4.4)... It doesn't toggle when I unplug the AC adapter and doesn't toggle between power management modes, so in-turn shuts off immediately without any notification that power has ran out. When I ran 'acpi', AC Adapter indicates properly when I unplug it and plug it back in, so I would rule out an ACPI issue, no? Is this a bug in Powerdevil?
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Apr 15, 2011
I have installed Ubuntu (both 10.10 and 11.04 pre-release) on my laptop but my battery is not recognized and it is detected as a desktop system rather than a laptop. I have tried the cat /proc/acpi/battery/BAT1/state method but the directory doesn't exist. I have tried another guide to paste the battery info into this directory but it doesn't allow me to do that and says that the directory doesn't exist, even though I'm trying to make it. I tried it in root nautilus and even on an install of Lubuntu (with a root file manager) but it still failed to budge. I really don't know what to do as I have tried all the guides on the internet that I could find.
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Jun 29, 2010
I have upgraded my laptop to 10.04 while having my usb-keyboard plugged in.f I boot the laptop without a plugged in keyboard, the laptop keyboard is not working. It starts working as soon as I plug a usb-keyboard in though.Quite annoying if I take my laptop with me and the first thing after booting is to find a usb-keyboard to plug in Does anyone know where can I reconfigure this? [edit]I just found out, that the laptop keyboar seems to be in numlock mode... meaning that the keys [j,k,l] is mapped to [1,2,3] etc
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Mar 28, 2011
I'm running Windows 7 Enterprise and noticed something new. The system icon for battery life is showing "plugged in, not charging." Does this oddity occur in Fedora too?
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Jan 16, 2011
I just replaced the battery on my motherboard in an older computer that I was going to load Linux on. Before I replaced the battery, I booted up the computer and my old copy of win2k loaded up fine. Now that I have replaced the battery, the BIOS will not load the ROM from my PCI ATA adapters (one SIIG ATA 133 IDE controller, and one Promise ATA 133 IDE controller) which are hooked to my hard drives that I boot from (software raid 1) and the CDROM drive in the system (along with some other hard drives for storage). I removed the adapters and stuck them in another computer to check them. They both loaded their ROM's into the BIOS of the other computer. So the cards are fine. The computer has an award BIOS. I have checked all of the settings and reset the CMOS again, but it will not load the ROMs from the PCI controllers into the BIOS on boot.
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Apr 14, 2011
I currently have a dell studio xps 16.. I'm new to Linux and can not seem to figure out how to force my laptop to play from its on board speakers. The laptop seems to believe there is headphone attached to the port constantly.. I figured this out when I use to run windows.. and my skype calls always activated the speakers.. so i know theres nothing wrong with the speakers (well i hope not). Is there any possible way to ignore the sound ports and force play from the speakers?
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Feb 23, 2010
I recently started using a Lenovo Thinkpad SL410 and started noticing how everything slows down whenever I plug the power in. It looks like the CPU is getting maxed by normal usage, just a web browser running. As soon as I unplug it, everything goes back to normal. It's almost as if things were backwards. Shouldn't it cap the CPU when it's running on battery? I wouldn't really want that behavior either, but that would be more understandable.
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May 7, 2010
I have 10.04 on an NEC Versa M500e laptop and when I plug it into the wall while running when the battery's low it goes into suspend mode; is it possible to fix this? Didn't have this problem in 8.04.
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Dec 23, 2010
I've got a Dell Inspiron 1545 with an ATI Mobility Radeon HD 4300 series card. I need proper OpenGL support, so it appears I need the fglrx driver. After I install it, I experience very odd freezes related to the power cable:
- It freezes if I rapidly take the plug in and out a few times
- It freezes if I run on battery power for a random amount of time between 10 and 20 minutes. This happens if I boot up on battery power, or if I take out the plug while it's on (assuming the first kind of freeze doesn't happen)
EDIT: I have changed absolutely nothing about the drivers, but now those specific freezes don't happen. Instead, I just got a random freeze, while the power cable was in and not being touched.
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Apr 29, 2011
I have a laptop cooler that sits under my laptop and has 4 USB ports on the back. It plugs into my laptop via USB and that is the only source of power it has. The issue is when I try to boot Ubuntu with it plugged in it hangs forever and if I unplug it then it seems to boot up just fine. This happens even if nothing is plugged into the ports on the cooler. I also notice that if I plug the cooler in after Ubuntu is fully booted it will work but does not see things plugged into it every time.
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Nov 24, 2010
My battery Icon dosn't showup.
I did
Code:
I recieve back
Code:
Traceback:
And I also did
Code:
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Apr 7, 2010
I just installed fedora 12 on my new lenovo laptop sl510 where I have pulseaudio over my alsa. The problem is, when I plugin headphones in 3.5 jack the speakers dont mute which is really irritating. I tried switching from "analog output" to "analog headphones", but what that does it mutes both.
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Jul 15, 2011
Acer 5250-BZ475 laptop, fresh install of Ubuntu 11.04. Boots up beautifully as long as an ethernet cable is plugged in. Otherwise, I get to the login screen and have just enough time to start typing in my password before the entire system hangs hard - no mouse, no keyboard, can't even get to a terminal, nothing. Have to hard power off the machine.
It seems to be a problem with the wireless card trying to initialize, but there doesn't seem to be a bios option to disable wireless on this laptop, so I'm a bit at a loss as to how to fix this problem. By the way, wireless works fine if I boot up with a cable connected - I can see all the wireless access points in my area no problem. I just can't boot without a wired connection, which makes my laptop more or less useless when I'm away from home with it.
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Feb 17, 2011
When I am working with Windows OS on the DELL-Vostro-1014 laptop the battery is working. If however I switch to Debian Squeeze OS the battery does not work. Running #hardinfo & shows that there is no battery. Am I right in assuming that the driver for the battery?
/sys/class/power_supply/BAT0 gives
model_name DELL X612G0
Serial No. 18069
manufacturer LG
What driver is needed, where to search for it and how to incorporate in the kernel 2.26.32-5-686 ?
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Jul 16, 2011
I need a way to kill my battery in my Ubuntu laptop. Is there any mind numbing tasks I can Ubuntu do that will eat up the battery? I have already shut off the power management options. The battery is giving my issues and and someone said I should discharge it fully an recharge it from 0.
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May 2, 2010
Since I had updated to Lucid, I'm having some trouble with running my laptop on battery. It usually turns off when the battery notifier is still at 13%~18% (it is not shutting down, it is like when your battery runs out of energy). First I had thought that was a problem with the notifier and I was missing when the battery had no charge, but I kept looking at the notifier and suddenly when it had reached 15% my laptop just went down, without saving any job.
I've just upgraded to Lucid Lynx, running on a HP Pavilion dv4-1123us with 2.00 GHz Intel Core2 Duo T5800, 4GB RAM.
The battery is a 6-cell Lithium-Ion that came with the laptop.
I'd bought it about 1 year ago.
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May 28, 2010
my laptop battery capacity has gone low due to constant charging or whatsoever reason. previously it was at 62% and within 2 months its gone down to 32%. I use the laptop atleast for 18hrs every day. so is ther any solution to prevent my battery from losing the capicity.
i use dell studio 15 laptop, with 3 gigs of ram, lithium ion battery(56Wh), ati card, using compiz, p8600 processor. i use this for app development and for listening to music and videos.
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Aug 22, 2010
Over the past few weeks I've noticed that my laptop battery is dieing VERY fast. I have no idea what is causing this, and I haven't changed anything.
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Aug 29, 2010
I would like to display my battery into conky for my laptop, do you have /proc/acpi/battery/BAT0 ? - I cant find it
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Feb 24, 2011
So I've been using Ubuntu on a Toshiba L645d, and after a few hiccups with the sound and wireless, it's finally working well now. However, the battery is still a bit less when compared to Windows 7 (2:00 vs 2:35, but it came with optimizations on W7 so that might be the reason. A comparison of power used: 25w of power on Ubuntu vs 17.5 on W7.
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Jun 1, 2011
I've got a problem with my laptop and I finally decided to try to solve it. My computer sometimes (not everytime) freezes. It's just when I'm using battery power. I figured out that this is not connected with some specific action (e.g. some app crash), it can freeze 1 minute after start or 10 minutes, I think it's random. I've checked my /var/log/messages.log file and these are the last messages before freeze (exactly at 9:16:15):
Code:
Jun 1 07:16:09 localhost rtkit-daemon[2170]: Successfully made thread 3472 of process 3472 (/usr/bin/pulseaudio) owned by '120' high priori$
Jun 1 07:16:09 localhost rtkit-daemon[2170]: Successfully made thread 3473 of process 3472 (/usr/bin/pulseaudio) owned by '120' RT at prior$
Jun 1 07:16:09 localhost rtkit-daemon[2170]: Successfully made thread 3474 of process 3472 (/usr/bin/pulseaudio) owned by '120' RT at prior$
Jun 1 07:16:09 localhost rtkit-daemon[2170]: Successfully made thread 3475 of process 3472 (/usr/bin/pulseaudio) owned by '120' RT at prior$
Jun 1 09:16:09 localhost gdm-simple-greeter[3481]: Gtk-WARNING: gtkwidget.c:6794: widget not within a GtkWindow
Jun 1 09:16:09 localhost gdm-simple-greeter[3481]: WARNING: Unable to read from file /etc/arch-release
Jun 1 09:16:09 localhost gdm-simple-greeter[3481]: Gtk-WARNING: gtk_widget_size_allocate(): attempt to allocate widget with width -47 and h$
Jun 1 09:16:11 localhost logger: ACPI action undefined: BAT1
I'm using Arch Linux x64, Gnome Shell and have the newest updates.
What's wrong with my laptop? Where should I look for errors?
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Apr 19, 2011
I have installed Ubuntu (both 10.10 and 11.04 pre-release) on my laptop but my battery is not recognized and it is detected as a desktop system rather than a laptop. I have tried the cat /proc/acpi/battery/BAT1/state method but the directory doesn't exist. I have tried another guide to paste the battery info into this directory but it doesn't allow me to do that and says that the directory doesn't exist, even though I'm trying to make it. I tried it in root nautilus and even on an install of Lubuntu (with a root file manager) but it still failed to budge. I really don't know what to do as I have tried all the guides on the Internet that I could find.
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Apr 17, 2016
I managed to install Jessie on my new Lenovo Ideapad 100 and have been trying to put the finishing touches on it. I downloaded FDPowermonitor and the icon showed up right away. Then after a few minutes it went away and hasn't shown back up.
I think I need to modify /etc/xdg/lxsession/LXDE/autostart to include @fdpowermon but I cannot figure out how to have the permission and use a editor I understand.
I just log into LXDE with root... but there has got to be a better way yes? But that didn't work anyway...
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Nov 2, 2009
Recently I installed FC 11 on my laptop. The OS is not displaying the battery status correctly in the notification area. if I remove the power cord after 100 % charging, the status remains the same even during discharging. It never informs me the correct discharge status or any warning when the battery power is critically low. This is causing unexpected shut downs and data loss to me. Is this a bug ? Do we have a solution for this. My laptop is Compaq CQ40-327TU; dual boot with Vista as alternate OS.
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Jun 24, 2011
I've been tooling around with Fedora with the Fluxbox environment on my old Dell 400SD4 laptop and it works fantastic. I'm still getting a feel for the environment, but one major concern that I had was a battery meter. Being a laptop, it's important to know when I'm almost out of juice. Does anyone have any suggestions for a battery meter for Fluxbox? Preferably one that can be installed through the yum repositories?
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