Re: Issue with notebook (maybe the battery?)

[David Wright <deblis@lionunicorn.co.uk>]

On Wed 24 May 2017 at 21:50:20 (-0300), Daniel Bareiro wrote:

> When you talk about "the numbers", do you mean to see by the console the
> values that are obtained for both batteries (voltage, for example) to
> make a comparison?

Yes, the bash function I use is:

battery () 
{ 
    local BATTERYFILE="/sys/class/power_supply/BAT0/uevent";
    [ ! -r $BATTERYFILE ] && printf '%s\n' "$BATTERYFILE not found!" && return 1;
    date +%Y-%m-%d-%H-%M-%S;
    cat $BATTERYFILE;
    local FILEBATNOW="/sys/class/power_supply/BAT0/charge_now";
    local FILEBATPREV="/sys/class/power_supply/BAT0/charge_full";
    local CHARGE=$(( 100 * $(< $FILEBATNOW) / $(< $FILEBATPREV) ));
    [ $CHARGE -lt 100 ] && printf '%s\n' "Charge: $CHARGE%"
}

AIUI uevent gives you the lot, which varies by model etc.
so just   cat /sys/class/power_supply/BAT0/uevent
should do it, with and without the power supply connected.

(I run a slightly more sophisticated version that also
reads the CPU temperature, has error trapping, and changes
the root window colour according to battery state and,
if frying, temperature.)

Cheers,
David.