not show battery serial number

[arjunjain]

i what to know % capacity of battery ...when i open /proc/acpi/battery/BAT0/info i get following

present: yes
design capacity: 4752 mWh
last full capacity: 4752 mWh
battery technology: rechargeable
design voltage: 10800 mV
design capacity warning: 475 mWh
design capacity low: 256 mWh
capacity granularity 1: 264 mWh
capacity granularity 2: 3780 mWh
model number: Primary
serial number:
battery type: Lion
OEM info: Hewlett-Packard

/proc/acpi/battery/BAT0/state

present: yes
capacity state: ok
charging state: charging
present rate: 0 mW
remaining capacity: 4420 mWh
present voltage: 10800 mV

in this serial number colom is empty , and it dont show the correct capacity

[Gödel]

it looks ok to me , says it's charging and currently at 4420 mWh, full capacity is 4752.

The serial number value probably isn't returned in a standard format, and the kernel drivers can't be expected to support every proprietary format (especially if it's not published)