/sys/class/power_supply/hid-b8:f6:b1:0a:99:f7-battery: POWER_SUPPLY_NAME=hid-b8:f6:b1:0a:99:f7-battery POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_ONLINE=1 POWER_SUPPLY_CAPACITY=20 POWER_SUPPLY_MODEL_NAME=Apple Wireless Keyboard POWER_SUPPLY_STATUS=Discharging POWER_SUPPLY_SCOPE=Device