Questions about battery usage and issues in Ubuntu.

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117
votes
22answers
90k views

Tips to extend battery life for laptops and notebooks

This question is present as a matter of historical interest. While you are encouraged to help maintain its answers, please understand that "big list" questions are not generally allowed on Ask ...
62
votes
11answers
78k views

How to check battery status using terminal?

I would like a command that check the battery status through the terminal
29
votes
5answers
19k views

Why does my computer get less battery life with Ubuntu compared to Windows?

Last year I purchased a Dell Inspiron 5315 laptop shipping with Windows 7 preinstalled. I installed Ubuntu 10.10 alongside it with dual-booting. On upgrading to Ubuntu 11.10, I was upset to find I now ...
26
votes
5answers
28k views

How can I limit battery charging to 80% capacity?

I just learned that some Lenovo laptops include a utility that offers to limit battery charging capacity to within 0–80% in order to slow the attenuation of the battery lifespan: How can I do this ...
17
votes
4answers
8k views

Laptop battery life drastically decreased compared to Windows 7 [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? I am running Ubuntu 10.10 on my Dell Studio XPS 1640 and have about one hour of battery life ...
17
votes
0answers
10k views

Battery life decreased after upgrade to 11.04 [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? After upgrading from Ubuntu 10.10, my battery life has decreased dramatically. There was a ...
15
votes
6answers
4k views

How can I optimize Ubuntu for minimal energy usage?

How can I optimize Ubuntu for minimal energy usage? I use my laptop for development, but also for writing. I have a 9 hour flight coming up and a 6 hour battery life when already using limited ...
14
votes
1answer
6k views

How to change critically low battery value?

I would like my laptop to hibernate itself when the battery level is 10% to be sure it has enough power to complete the operation properly. Actually if I don't pay attention my laptop informs me it ...
14
votes
0answers
325 views

What actions does Ubuntu trigger when battery is low?

When the battery is low, the screen gets dimmed after a few seconds already. This appears to be some special power-saving mode, and might be related to the time in ...
13
votes
2answers
9k views

How to charge the battery till 60-80% only?

I just got my laptop's battery replaced and read a bit about how to prolong it's life. Most people say that the best choice is not to charge it will 100%, but rather to 60-80%. My battery is quite ...
12
votes
6answers
12k views

Can I set the power indicator to show battery percentage instead of time remaining?

It's great that the indicator applet tells me I have 2 hours and 12 minutes of battery left, or that it will be charged in 1 hour 8 minutes, but I might well change my pattern of usage during that ...
12
votes
2answers
7k views

How to get the correct battery status?

At this moment, ever since I installed Ubuntu on this machine, the battery status says: not present. Looking at this answer, however, I find that /proc/acpi/battery/BAT1/info (sometimes its ...
10
votes
3answers
10k views

Increase screen idle dim timeout

On Ubuntu 11.10, when on battery, the screen dims after 10 seconds of inactivity. This is annoying because it is too short. Is there anyway to increase this timeout? I know I can disable it, but ...
10
votes
0answers
4k views

Battery drain on ubuntu is fast [duplicate]

My battery drain on win7 is less than that of ubuntu (around 45 min of difference). Can you advice me something to get best battery performance on my laptop? when I decrease the brightness it remains ...
9
votes
3answers
3k views

Kernel patch that solves battery issues when for ubuntu ? [closed]

http://www.phoronix.com/scan.php?page=news_item&px=MTAxNDM When will this come for ubuntu ? I am getting tired with my 11.10 dieing at little over 50 minutes of battery when at the most extreme ...
8
votes
3answers
8k views

Is there any utility to check whether my laptop battery is in healthy condition or not?

Is there any utility available on Ubuntu to check whether laptop battery is in healthy condition or not?
8
votes
9answers
18k views

display brightness problem with ubuntu 13.04

I have a Dell Inspiron 5520 with intel core i7 and AMD Graphics card. It used to work fine with Ubuntu 12.04 and Ubuntu 12.10. Now I tried to install Ubuntu 13.04 but i can't change display ...
8
votes
3answers
2k views

Dual Boot: Ubuntu using 3 times more battery than Leopard?

Just a quick question: I have noticed when I boot into Ubuntu my battery goes empty faster, and checking the "time left" option in Leopard and Ubuntu it says Mac will last 3 hours where Ubuntu will ...
8
votes
5answers
2k views

How to see the discharge rate of the battery

Maybe this question was made earlier but I can't find it. I want to see a terminal command or gui program that can show me the discharge rate of the battery. What hardware parts or programs are using ...
8
votes
3answers
6k views

where did /proc/acpi/battery/BAT0/XXX go in 12.10?

I use some custom scripts that use and monitor the battery information that was in: /proc/acpi/battery/BAT0/(state|info) However, since upgrading to 12.10 I no longer have those files and I've been ...
8
votes
1answer
10k views

Battery indicator missing in gnome classic

I had upgraded to ubuntu 12.04 from Ubuntu 11.10 and I am also using gnome classic. But the Battery indicator is Missing in the taskbar. So i followed the link ...
8
votes
4answers
2k views

Is Ubuntu better on battery than other OS's? [duplicate]

nothing really to say here, except it would be cool to get some examples on what OS's might save me battery life and if you have any suggestions on apps that would save battery on ubuntu that would be ...
8
votes
2answers
972 views

Where are the battery graphs?

Once upon a time, when I went to the battery icon on my netbook, I could get it to show me interesting graphs of the battery state, and how it had changed over time. Nowadays, in this time of decay, ...
8
votes
2answers
319 views

How can I play a custom sound when my battery is low?

I want my computer to play a custom sound file when my battery is low (say 10%). How can I do this? Thanks
8
votes
3answers
2k views

System shows “Battery Critically low”

I am using Ubuntu 11.10 on VAIO . Whenever I unplug the charger from my laptop, there comes a dialog showing "battery critically low" and system suspends, even when the charge is 100%.
7
votes
5answers
3k views

Application to display battery info

First of all, I am not sure the title of this question is the most appropriate however this is what I meant to say, There are many ways to extend the life of a laptop battery. One way is by not ...
7
votes
2answers
5k views

Do 'Tunables' in 'PowerTop' help on battery life?

I installed PowerTOP 1.97 and i got many Bad in Tunables, I know i can press enter to toggle but does it really change anything? and if it does will it still be changed when i reboot? If i get ...
7
votes
3answers
5k views

Battery Critically Low at 85%?

I, along with many others, have been experiencing a problem with our Ubuntu 11.10 installations on our battery-powered laptop devices: The computer misreads information from the battery, so it thinks ...
7
votes
1answer
1k views

How to check charged percentage of battery and to adjust its thresholds?

I was wondering how to check the current charged percentage of battery on my Lenovo T400? I forgot which program I used to control the battery to stop charging at 60% and start charging at 40%. Now ...
7
votes
2answers
2k views

Won't Hibernate when Battery Critical

Ubuntu 12.04 64bit refuses to hibernate when battery is critically low. Instead it does a complete shutdown which is unnecessary and can cause loss of data. I have enabled Hibernate (pm-hibernate) ...
7
votes
1answer
4k views

How can I get notification when my laptop battery gets fully charged?

Sometimes my charger remains plugged into laptop even after charging is complete. Is there a way to get a pop-up message/notification when my battery gets full due to charging or is there any ...
7
votes
4answers
1k views

Suspend when critically low power 11.10

Is there a way to suspend when Ubuntu is at critically low power. The only option in Ubuntu 11.10 power setting is to shutdown or hibernate. I run my battery all the way down till it suspends then i ...
6
votes
5answers
5k views

Battery indicator is stuck on “estimating”?

After installing Ubuntu 10.10, the battery indicator worked fine (both percent remaining and estimation on time). I then installed and configured some software (Skype, Pidgin, Thunderbird, removed ...
6
votes
3answers
6k views

how can I reset the battery statistics for the powermanager?

I changed my batteries and the battery statistics of the GNOME manager got skewed. Where would the files having the battery statistics be?
6
votes
1answer
925 views

Always be 100% bright when I'm using battery

When I'm using battery only - Ubuntu turns in some mode, when If I do not use my PC for about 5-10 seconds - the screeen becomes darker. Where do turn this option off? Because I often need to read ...
6
votes
1answer
766 views

How can I increase time of working from my battery?

Usually I am not even able to watch film from start to end. I use Acer Aspire 5930 OS is Ubuntu 11.04 I use Classic Ubuntu desktop (AFAIK it really means GNOME2) I know, that: I can decrease ...
6
votes
3answers
9k views

Brand new battery is 100% charged but at 0% capacity

I just bought a brand new battery to replace one that had seemingly died. I followed the instructions that came with the battery and charged it overnight, then ran my computer on battery until it was ...
6
votes
2answers
2k views

Laptop immediately suspends when going onto battery power

I've got an MSI Wind, model U100 that's been running Ubuntu without trouble for a long while. After upgrading to 10.04 a few months ago, I've had this strange problem. As soon as I unplug the laptop ...
6
votes
2answers
2k views

Battery information on Fluxbox

How can I get my battery info (percentages) on Fluxbox? I've heard of the gnome-power-manager, and wanted to use that, but there seems to be a problem... $ gnome-power-manager gnome-power-manager: ...
6
votes
2answers
2k views

Battery icon changed?

I don't know what happened, but today when I logged in to Ubuntu 12.04, the battery icon looked strange (when unplugged): When it's plugged, the icon looks as always been, the problem is when it's ...
6
votes
2answers
2k views

How to prevent battery from charging while on UPS

I'm running on UPS power and would like to prevent the laptop's battery from charging, to increase the amount of power available to other devices. Is there a way to do this? update The machine is a ...
6
votes
1answer
708 views

How do I remove the mouse battery indicator? [duplicate]

I just upgraded from 13.04 to 13.10 and it seems there has been a new notification/status bar thingy (sorry I'm new to Ubuntu) for my mouse battery. It is in the place where it normally tells me how ...
6
votes
1answer
241 views

I bought a new battery and Ubuntu 12.10 isn't recognizing it

I inherited my mom's old laptop and installed Ubuntu over top of Vista, so now it is purely Ubuntu. Her old battery only lasted about 10 minutes, so it had to be plugged in all the time, which I ...
6
votes
3answers
836 views

laptop-mode-tools and harddrive spinoff

So I wanted to extend my laptop battery life. After googleing a lot I found many tips and tricks. Some even in this site as well. Then I found this package in synaptic as well laptop-mode-tools. Now I ...
6
votes
0answers
1k views

Can not estimate remaining battery time? [duplicate]

Possible Duplicate: Laptop's battery is stuck on “estimating”? After updating to Ubuntu 10.10 from 10.04 Ubuntu can not estimate both the battery time and the percentage ...
5
votes
5answers
9k views

Is Ubuntu Battery Management Better Than Windows?

Is Ubuntu battery management better than Windows ? I have noticed that in Windows 7 a fully charged battery shows 3:30 minutes but in Ubuntu it shows 2:00 hours ... !!! so what is the power ...
5
votes
8answers
23k views

12.04 hangs at “checking battery state”

My 12.04 system hangs at "Checking battery state". At this stage, no commands work eg: Ctrl+Alt+f1, or Alt+f5. I ran recovery mode, and ran the following commands: sudo mount -o remount, rw / sudo ...
5
votes
3answers
2k views

How can I see more battery info when using Gnome shell?

I've been using Gnome Shell on Ubuntu 11.10 and I've been fairly satisfied. One thing that I really wish was different though is the battery icon. I can't tell by glancing at it what my battery ...
5
votes
2answers
1k views

Battery indicator has disappeared from Gnome panel

I'm using Gnome Flashback (still the best!) on Ubuntu 14.04. In the Indicator app, it used to always show the battery level indicator. Now, it's missing entirely: I've looked in the power settings ...
5
votes
3answers
7k views

Poor battery life in Ubuntu 12.10 on Toshiba p755-s5215, how can i manage background applications?

I have a dual-booted laptop, where windows gives a good 3.5 hours on battery, while on Ubuntu 12.10 my laptops runs only for 2 hours. I heard about powertop and laptop-tools, but after installing ...