Re^2: Laptop Battery Percentage

the state file is kinda static, as in it shows the current state, from which one cannot deduce the percentage.

The info file is much more informative:

$ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         5144 mAh
last full capacity:      5144 mAh
battery technology:      rechargeable
design voltage:          10800 mV
design capacity warning: 200 mAh
design capacity low:     100 mAh
cycle count:              0
capacity granularity 1:  100 mAh
capacity granularity 2:  100 mAh
model number:            Primary
serial number:           49233 2011/02/25
battery type:            LIon
OEM info:                Hewlett-Packard
[download]

Combining the two gets you to:

$ cat /proc/acpi/battery/*/* | grep capacity:
design capacity:         5144 mAh
last full capacity:      5144 mAh
remaining capacity:      5144 mAh
$
[download]

Or in perl:

$ perl -MDP -e'while(<>){/^(.*)\s+capacity:\s*((\d+).*)/ and$i{$1}=[$2
+,$3]}print"$_: $i{$_}[0], "for keys%i;printf"%5.1f%%\n",100*$i{remain
+ing}[1]/$i{design}[1]' /proc/acpi/battery/*/*
remaining: 5144 mAh, design: 5144 mAh, last full: 5144 mAh, 100.0%
[download]

Enjoy, Have FUN! H.Merijn

Comment on Re^2: Laptop Battery Percentage Select or Download Code

Replies are listed 'Best First'.
Re^3: Laptop Battery Percentage by jimmy.tty (Scribe) on Aug 02, 2011 at 23:36 UTC
I use this code in gnu screen's statusbar: `backtick 1 1 1 sh -c 'perl -ne "/^(la\|re\|st)[^:]+:\s+(\S+)\s/and \$h{\ +$1}=\$2}{\$h{st}=~s/of./-/;\$h{st}=~s/on./+/;printfq(%.0f%%%s),\$h{ +re}100/\$h{la},\$h{st}" /proc/acpi/battery/BAT0/ /proc/acpi/ac_adap +ter/ACAD/state'` [download]	[reply] [d/l]
Re^3: Laptop Battery Percentage by strredwolf (Chaplain) on Aug 05, 2011 at 03:18 UTC
But what if you have two batteries? Some laptops allow that. You will have multiple lines. Information doesn't want to be free. It wants to be feline.	[reply]
Re^4: Laptop Battery Percentage by Tux (Canon) on Aug 05, 2011 at 07:16 UTC
Accumulate? Untested concept: `$ perl -MDP -e'while(<>){/^(.)\s+capacity:\s((\d+).)/\|\|next;$i{$1}[ +0]+=$2;$i{$1}[1]//=$3}print"$_: $i{$_}[0], "for keys%i;printf"%5.1f%% +\n",100$i{remaining}[1]/$i{design}[1]' /proc/acpi/battery//` [download] Enjoy, Have FUN! H.Merijn	[reply] [d/l]