FC3 boot process consuming lot of battery power (true/false)?

[AdabalaP schneider com]

Now that i have "acpi=off", and my APM works, I tried to check my battery
usage;

(a) I tried to run my laptop on battery and worked fine to about 1.30 to
1.45 hr, before it got suspend command (tested 4 time, same result),
(b) Tried a reboot on battery power, Always got suspend before it was
totally up. My boot process takes 4-5 minutes for a complete boot.
NOTE: Batter is 100% charged for every test.

What could be draining the fully charged battery ?

Thanks