Battery meter / ACPI info wrong

[SonicSteve]

Hi friends,

I have a compaq laptop F700 series. The battery is a 4400 mah. Yet as you can see below the battery info shows it as 6000 mah. Also the battery is a 47 Wh battery as listed on the battery itself yet the meter thinks it is a 75 Wh battery. It seems that it has the specs completely wrong. Does anyone know how to fix this?

Product: Primary
Status: Charged
Percentage charge: 100.0%
Vendor: Hewlett-Packard
Technology: Lithium ion
Serial number:
Model: Primary
Capacity: 63% (Poor)
Current charge: 47.6 Wh
Last full charge: 47.6 Wh
Design charge: 75.0 Wh


steve@Compaq-laptop:~$ sudo cat /proc/acpi/battery/*/state
[sudo] password for steve:
present: yes
capacity state: ok
charging state: charged
present rate: unknown
remaining capacity: 3808 mAh
present voltage: 12499 mV
steve@Compaq-laptop:~$ sudo cat /proc/acpi/battery/*/info
present: yes
design capacity: 6000 mAh
last full capacity: 3808 mAh
battery technology: rechargeable
design voltage: 14800 mV
design capacity warning: 197 mAh
design capacity low: 119 mAh
capacity granularity 1: 10 mAh
capacity granularity 2: 25 mAh
model number: Primary
serial number:
battery type: LION
OEM info: Hewlett-Packard
steve@Compaq-laptop:~$

[the_felis_leo]

idem on Pavillon dv9217ea (serie dv9200/dv9000)
with new battery of 4200mAh :

design capacity:         6000 mAh
last full capacity:      4256 mAh

leo@felis-kingdom:/proc/acpi$ uname -a
Linux felis-kingdom 2.6.28-15-generic #49-Ubuntu SMP Tue Aug 18 19:25:34 UTC 2009 x86_64 GNU/Linux

also "remaining capacity" not accuraly repported.
try "acpi_apic_instance=2", seems to correct this second problem.
No more test done, need confirmation...