update prompt

zsh/prompt

@@ -19,15 +19,23 @@ fi
 precmd() {
   # battery charge
   function batcharge {
-    bat_perc=$(acpi | awk {'print $4;'} | sed -e "s/\s//" -e "s/%.*//")
-    if [[ ${bat_perc} < 15 ]]; then
-      col="%{$fg_bold[red]%}"
-    elif [[ ${bat_perc} < 50 ]]; then
-      col="%{$fg_bold[yellow]%}"
+    local _bat_perc=0
+    local _num=0
+    local _bat
+    for _bat in /sys/class/power_supply/BAT*; do 
+      let "_bat_perc += $(cat ${_bat}/capacity)"
+      let "_num += 1"
+    done
+    _bat_perc=$((${_bat_perc}/${_num}))
+    local _col
+    if [[ ${_bat_perc} < 15 ]]; then
+      _col="%{$fg_bold[red]%}"
+    elif [[ ${_bat_perc} < 50 ]]; then
+      _col="%{$fg_bold[yellow]%}"
     else
-      col="%{$fg_bold[green]%}"
+      _col="%{$fg_bold[green]%}"
     fi
-    echo "%{$fg_bold[white]%}["$col$bat_perc"%{$fg_bold[white]%}%%]%{$reset_color%}"
+    echo "%{$fg_bold[white]%}["${_col}${_bat_perc}"%{$fg_bold[white]%}%%]%{$reset_color%}"
   }
   # last command
   returncode="%(?.%{$fg[green]%}.%{$fg[red]%})%?%{$resetcolor%}"