Hi, I am wondering what the semantics of POWER_SUPPLY_CHARGE_FULL(_DESIGN) are. I am using a ~3 years old thinkpad with its first battery so aging is something normal I guess. (see below). [watnuss@tp ~]$ cat /sys/class/power_supply/BAT0/uevent POWER_SUPPLY_NAME=BAT0 POWER_SUPPLY_STATUS=Unknown POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CYCLE_COUNT=0 POWER_SUPPLY_VOLTAGE_MIN_DESIGN=11100000 POWER_SUPPLY_VOLTAGE_NOW=12484000 POWER_SUPPLY_CURRENT_NOW=0 POWER_SUPPLY_CHARGE_FULL_DESIGN=7800000 POWER_SUPPLY_CHARGE_FULL=5052000 POWER_SUPPLY_CHARGE_NOW=4551000 POWER_SUPPLY_CAPACITY=90 POWER_SUPPLY_CAPACITY_LEVEL=Normal POWER_SUPPLY_MODEL_NAME=42T4799 POWER_SUPPLY_MANUFACTURER=SANYO POWER_SUPPLY_SERIAL_NUMBER= 5878 As I understand POWER_SUPPLY_CHARGE_FULL_DESIGN would be the capacity of a fully charged new battery and POWER_SUPPLY_CHARGE_FULL is the maximum capacity of the battery today. I am asking because I am using i3status to show my battery loading state and it shows me 58% which would be (CHARGE_NOW / CHARGE_FULL_DESIGN). If I understand correctly this doesn't make any sense if I am not able to reach the CHARGE_FULL_DESIGN capacity anyways, today. So if anyone with a bit more knowledge about this mechanic could confirm my guess I would contact upstream what they think about it. (In my opinion they should read CHARGE_FULL to determine the current battery %) Another issue I have is that the POWER_SUPPLY_STATUS shows 'Unknown' on AC but 'Discharging' on Battery. Do you have any idea why? My guess is that i3 uses this property to show the battery/AC state in i3status and because of the 'Unkown' value I don't get updates on the state there. Best regards and thanks for your help Christian Am 16.08.2014 22:11, schrieb Jakub Klinkovský: > On 15.08.14 at 12:27, Chrisitan Burkard wrote: >> ... >> Another issue I have is that the POWER_SUPPLY_STATUS shows 'Unknown' on >> AC but 'Discharging' on Battery. Do you have any idea why? My guess is >> that i3 uses this property to show the battery/AC state in i3status and >> because of the 'Unkown' value I don't get updates on the state there. > > The values for POWER_SUPPLY_STATUS on my laptop are: > - when running on battery, it is always 'Discharging' > - when running on AC: > - 'Full' for 100% > - 'Unknown' for 95%-99% > - 'Charging' for <95% > Note that my battery is not getting charged if the level is between 95% and 99% > when I plug in AC. > > -- > jlk >
