ZSH Battery Prompt

battery.zsh

###################################
# .zsh/functions/battery_percent
###################################

LAST_FULL_CAP=$(grep -h "last full capacity" /proc/acpi/battery/BAT?/*| sed 's/[^0-9]//g')
REMANING_CAP=$(grep -h "remaining capacity" /proc/acpi/battery/BAT?/*| sed 's/[^0-9]//g')
BATTERY_CHARGING=$(grep -h "charging state:" /proc/acpi/battery/BAT?/state|sed 's/.*:\s*//')
BATTERY_PERCENT=$((($REMANING_CAP*100)/$LAST_FULL_CAP))

if [[ "${BATTERY_PERCENT}" -lt 15 ]]; then
    PR_BATTERY+="%{$fg[red]%}$BATTERY_PERCENT%%"
elif [[ "${BATTERY_PERCENT}" -lt 50 ]]; then
    PR_BATTERY+="%{$fg[yellow]%}$BATTERY_PERCENT%%"
else
    PR_BATTERY+="%{$fg[green]%}$BATTERY_PERCENT%%"
fi

if [[ "${BATTERY_CHARGING}" == "charging" ]]; then
    PR_BATTERY+="%{$fg[yellow]%}⚡"
fi
PR_BATTERY+="%{$reset_color%}"

printf "%s" $PR_BATTERY❯ cat zsh/functions/battery_percent
LAST_FULL_CAP=$(grep -h "last full capacity" /proc/acpi/battery/BAT?/*| sed 's/[^0-9]//g')
REMANING_CAP=$(grep -h "remaining capacity" /proc/acpi/battery/BAT?/*| sed 's/[^0-9]//g')
BATTERY_CHARGING=$(grep -h "charging state:" /proc/acpi/battery/BAT?/state|sed 's/.*:\s*//')
BATTERY_PERCENT=$((($REMANING_CAP*100)/$LAST_FULL_CAP))

if [[ "${BATTERY_PERCENT}" -lt 15 ]]; then
    PR_BATTERY+="%{$fg[red]%}$BATTERY_PERCENT%%"
elif [[ "${BATTERY_PERCENT}" -lt 50 ]]; then
    PR_BATTERY+="%{$fg[yellow]%}$BATTERY_PERCENT%%"
else
    PR_BATTERY+="%{$fg[green]%}$BATTERY_PERCENT%%"
fi

if [[ "${BATTERY_CHARGING}" == "charging" ]]; then
    PR_BATTERY+="%{$fg[yellow]%}⚡"
fi
PR_BATTERY+="%{$reset_color%}"

printf "%s" $PR_BATTERY

###################################
# .zshrc
###################################

# check for any ACPI batteries to find out if we're running on a laptop
# if running on a laptop, show battery charge percent
/sbin/modprobe battery 2> /dev/null || true
if [ -d /sys/class/power_supply ]; then
       if grep -q Battery /sys/class/power_supply/*/type 2>/dev/null; then
               PROMPT+=$' $(battery_percent)'
       fi
fi