Dell Inspiron i8100 with 2 batteries

I am using 2.4.18 and have a Dell I8100 with 2 batteries.  If combined charge
of the batteries is less than 50% (according to the bios), then /proc/apm
shows the battery power level X 2.  If the combined charge of the batteries is
greater than 50%, then /proc/apm shows:

    1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?

I think this is because the bogus calculation it would make would result in a
percentage > 100.

I took a quick look at arch/i386/kernel/apm.c but it wasn't obvious what to
do.

Does anyone else have any experience with this?