I'm currently using a Versa SX as my primary computer, and it _seems_
to have a battery charge problem, though the batteries themselves are
not above suspicion. I have six main batteries for this computer and
one secondary battery (for the CD-ROM bay). I'd like to hear from
anyone who has experience poking about in these machines at a
component level. I have several other machines of the same model,
which I can use for donor parts - but they all have nominally bad
mainboards (I think they were powered off during BIOS update) so I
can't do the obvious, which is switch out the mainboard.

Anyway, here are the symptoms:

#1 If I charge with the computer switched on, the charge process will
stop short of 100% - the charge LED is still on, but the battery
capacity remains stuck. The level at which it sticks seems to be
fairly constant for each battery; for example, one usually sticks at
39%, a different one at 14%, etc. If I unplug AC for a few seconds
then reapply it, the charge process resumes, but the battery only goes
up one or two % then almost immediately jumps to 100%.

#2 If I COMPLETELY discharge the battery by leaving the computer at
the CMOS setup screen, then apply AC with the computer switched off,
the charge process appears to complete normally (charge LED goes off
after about an hour) and battery reports 100%, but it only lasts about
ten minutes.

Note: I haven't yet tested the secondary battery. All I did so far is
charge it once; it went from 0 to 100% at a normal sort of rate but I
didn't test capacity.

The batteries are not above suspicion, but this really feels like a
problem with dT/dt sensing, maybe a problem with the ADC that monitors
the battery thermistor; symptom #1 really looks like the charge
controller is sensing, maybe erroneously, an overtemperature condition
that pauses fast charge mode.