Sometimes the energy status applet on my gnome panel suddenly disappears.
Is there a simple command to print the loading state of the battery?
There are different methods for this:
First, you could install the package acpi and run it like to:
acpi -b
It will show you the battery's current capacity and whether it's charging, discharging and how long it will last/take to be recharged if charging.
If you don't want to install new packages, there's also the proc filesystem to query: cat /proc/acpi/battery/BAT0/state
, which will give you the following output:
present: yes
capacity state: ok
charging state: charged
present rate: 1 mA
remaining capacity: 7800 mAh
present voltage: 12062 mV
for more details on your battery, check cat /proc/acpi/battery/BAT0/info
present: yes
design capacity: 7800 mAh
last full capacity: 2898 mAh
battery technology: rechargeable
design voltage: 11100 mV
design capacity warning: 780 mAh
design capacity low: 236 mAh
cycle count: 0
capacity granularity 1: 78 mAh
capacity granularity 2: 78 mAh
model number: DELL WK3798
serial number: 1226
battery type: LION
OEM info: Sanyo
cat /proc/acpi/battery/BAT0/state
Will give you the remaining capacity.
cat /proc/acpi/battery/BAT0/info
To check the maximum capacity, both last and designed.
Note that BAT0 is a name that can change between computer models.
cat /proc/acpi/battery/*/state
as my battery is named BAT1 and I don't see many people having another battery present.
Dec 22, 2011 at 6:10
You could execute gnome-power-statistics
just to see in the gui and help you with the panel problem (Just to add to the help). The correct answer would be:
cd /proc/acpi/battery
ls
to see what is the name of your Battery, could be BAT0, BAT1, etc..cat BAT0/state
BAT0/info
You can also install acpi sudo apt-get install acpi
then type acpi -b
in console
It's pretty easy to write a script to check the battery level stuff.
When I was toying with ruby I wrote one here
It does require the gem for ansi/code for the coloring at the terminal.
This is kind of a bash alternative that I used at one time
The stuff with the BAT0 vs BAT1 is that on my laptop I had a second battery in the DVD drive bay so there were actually two to check.