scripts/batleft at master · Aparicio99/scripts · GitHub

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#!/usr/bin/awk -f

function readval(file) {
	if (getline line < (path file) > 0)
		return line
	else
		return 0
}

BEGIN {
	path1 = "/sys/class/power_supply/BAT0/"
	path2 = "/sys/class/power_supply/BAT1/"

	if (readval(path1"present"))
		path = path1
	else
		path = path2

	status        = readval("status")
	capacity      = readval("capacity")
	voltage_now   = readval("voltage_now") / 1000000

	energy_now    = readval("energy_now") / 1000
	energy_full   = readval("energy_full") / 1000

	charge_now    = readval("charge_now") / 1000
	charge_full   = readval("charge_full") / 1000

	power_now     = readval("power_now") / 1000
	current_now   = readval("current_now") / 1000

	if (!energy_now)
		energy_now  = charge_now * voltage_now

	if (!energy_full)
		energy_full = charge_full * voltage_now

	if (!power_now)
		power_now   = current_now * voltage_now

	printf "Status: %s\n", status
	printf "Charge: %d% (%d/%d mWh)\n", capacity, energy_now, energy_full
	printf "Current: %d mA @ %.3f V\n", current_now, voltage_now
	printf "Power usage: %.2f W\n", power_now / 1000

	if (status == "Discharging")
		time_left = energy_now / power_now

	else if (status == "Charging")
		time_left = (energy_full - energy_now) / power_now

	hours_left   = int(time_left)
	minutes_left = int((time_left - hours_left) * 60)
	printf "Time left: %dh%02dm\n", hours_left, minutes_left


}