PERCENT="${(C)${(s| |)$(acpi 2>/dev/null)}[4]}"
[ -z "$PERCENT" ] && PERCENT='acpi not present'
if [ "${PERCENT%%%}" -lt 20 ] ; then
PERCENT="${(C)${(s| |)$(acpi 2>/dev/null)}[4]}"
[ -z "$PERCENT" ] && PERCENT='acpi not present'
if [ "${PERCENT%%%}" -lt 20 ] ; then