Wrong reported battery design capacity

asked 2014-02-22 09:19:35 -0500

mihkel gravatar image

Hi

I just bought a 9 cell battery to replace dead 6 cell battery for my trusty elitebook 6930p. On that new battery it says: 10.8V, 7800mAh. I fully charged it, but when I run upower --dump, it reports that energy-full-design: is 66,6 Wh and energy-full: is 70,5183 Wh. Also acpi -bi reports:

Battery 0: design capacity 6000 mAh, last full capacity 6353 mAh = 100%

So. WTF :)

Did I get actually a 6 cell battery which looks like a 9 cell battery or Fedora does not understand correct values?

$ grep . /sys/class/power_supply/*/*
grep: /sys/class/power_supply/AC/device: Is a directory
/sys/class/power_supply/AC/online:1
grep: /sys/class/power_supply/AC/power: Is a directory
grep: /sys/class/power_supply/AC/subsystem: Is a directory
/sys/class/power_supply/AC/type:Mains
/sys/class/power_supply/AC/uevent:POWER_SUPPLY_NAME=AC
/sys/class/power_supply/AC/uevent:POWER_SUPPLY_ONLINE=1
/sys/class/power_supply/BAT0/alarm:0
/sys/class/power_supply/BAT0/capacity:98
/sys/class/power_supply/BAT0/charge_full:6353000
/sys/class/power_supply/BAT0/charge_full_design:6000000
/sys/class/power_supply/BAT0/charge_now:6257000
/sys/class/power_supply/BAT0/current_now:875000
/sys/class/power_supply/BAT0/cycle_count:0
grep: /sys/class/power_supply/BAT0/device: Is a directory
/sys/class/power_supply/BAT0/manufacturer:Hewlett-Packard
/sys/class/power_supply/BAT0/model_name:Primary
grep: /sys/class/power_supply/BAT0/power: Is a directory
/sys/class/power_supply/BAT0/present:1
/sys/class/power_supply/BAT0/serial_number:00001 2013/10/24
/sys/class/power_supply/BAT0/status:Unknown
grep: /sys/class/power_supply/BAT0/subsystem: Is a directory
/sys/class/power_supply/BAT0/technology:Li-ion
/sys/class/power_supply/BAT0/type:Battery
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_NAME=BAT0
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_STATUS=Unknown
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_PRESENT=1
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_TECHNOLOGY=Li-ion
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_CYCLE_COUNT=0
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_VOLTAGE_MIN_DESIGN=11100000
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_VOLTAGE_NOW=12411000
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_CURRENT_NOW=875000
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_CHARGE_FULL=6353000
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_CHARGE_NOW=6257000
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_CAPACITY=98
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_MODEL_NAME=Primary
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_MANUFACTURER=Hewlett-Packard
/sys/class/power_supply/BAT0/uevent:POWER_SUPPLY_SERIAL_NUMBER=00001 2013/10/24
/sys/class/power_supply/BAT0/voltage_min_design:11100000
/sys/class/power_supply/BAT0/voltage_now:12411000

Notice that line :

POWER_SUPPLY_VOLTAGE_MIN_DESIGN=11100000

On battery (as I already wrote) it is 10.8V, but kernel sees it as 11.1V

edit retag flag offensive close merge delete