#!/bin/sh

awk 'BEGIN { status = ""; q_now = 0; q_full = 0; i_now = 1; perc = 0; FS="="; }
/POWER_SUPPLY_STATUS/ { status = $2; }
/POWER_SUPPLY_CURRENT_NOW=/ { i_now = $2; }
/POWER_SUPPLY_CHARGE_NOW/ { q_now = $2; }
/POWER_SUPPLY_CHARGE_FULL/ { q_full = $2; }
/POWER_SUPPLY_CAPACITY=/ { perc = $2; }
END {   if (status=="Full"||status=="Unknown") {
            print status
        } else {
            if (status=="Charging") {q = q_full - q_now} else {q = q_now};
            h=q/i_now;
            m=(h-int(h))*60;
            printf("%s%d%% %dh%02dm\n",
                    substr(status, 0, 1),
                    perc,
                    h, m);
        }
    }' \
    /sys/class/power_supply/BAT1/uevent