[ltp] Battery dying

[Rudolf W. Heuberger]

Hi. I myself have a TP770Z, 2,6 years old and 2 .. 3 times deep-de
charged accu (was not the intension). I upgraded also the Bios
when the recharge-only-after-accu-below-95percent fix apeared. The
machine shows also the symptom uf jumping from abt. 89 % to 5 %.

In the company I work my collegues have Compaq Armada 1750 (also 
Li Ion, higher voltage as I remember, about same AmpHour rating).
This week I conducted a test with two Armadas: one lasted more
than 3 hourse before he warned from deep-dischage. Sunday night
I conducted a test with my 770Z: I arrived that the TP770Z was alive
for more than 1 hour (!!!) afer showing 5 % on the control LCD .. then
I recharged, fiddled with APM on Win98 and since then the TP goes to
suspend/hibernate shut down when reaching 1 %. Probably I'll try this
sat/sun again to allow the wunderfull 1 hour run with only 5 % capacity.

  The 1 hour-effect was very surprisingly for me, I do not understand
  the effect: it's am magic (say: look like a preventive trick against
  seldom arising problems with Li Ion cells: HAL wants probably be on
  the very safe side ((I hope, it's not a marketing gag to sell accus))
).


The company I worked until 2,5 years ago: we had TP 750, TP 750 C, 755
C,
755 CDX (with video in) and up to TP 765 CD (total base of TP: around
15)
(I had a TP 755 CDX, running OS/2, Linux and NT4 ((NT4 by diskswapp))
with Tokenring LAN). The TP 750 / 750 C accus had a external switch
(that
reseted also the memory of the circuit inside the accu?). With that
switch I was in 1 of 2 cases successful in re-animation of the accu
(else
I had to order a replacement). My TP 755 CDX had no such switch .. and
also
no accu-probs.

Hearing from you out here, I ordered this week a new accu for my TP770Z.
Probably I will not dispose my old before having it opened and analyzed
the inside life .. but first I must wait until the new arrives ;-)

If I find a surprise for me I'll report here.

Rud.



Tod Harter wrote:
> 
> Well, I know that once in a while apmd seems to "miss" a bios notification.
> For instance my A20p the other day was reporting that it was on battery power
> and "charging", even though it was plugged in.  Indeed it was charging fine
> and once I rebooted the apm command and the KDE battery meter docklet
> returned from lalaland. Its just one of those things. There may be a bug in
> the apm bios on your machine or maybe even a glitch in your battery that
> causes it to report some absurd charging condition once in a while. I'd try
> playing with apm settings in the kernel and/or see if the problem goes away
> with a different battery if you have one available to test with.
> 
> On Thursday 08 November 2001 14:30, you wrote:
> >  --- Madhusudan Singh <chhabra@eecs.umich.edu> wrote:
> > > I think I mentioned that it is *not* a hardware problem apparently.
> > >
> > > When I reboot with the power supply disconnected, the charge is up to 96
> > > % even after it had forced me to reboot after giving me a 0 % charge
> > > notification.
> > >
> > > I am quite certain that there is no "ghost" recharging it from 0 % to 96
> > > % in the 1-2 minutes it takes to reboot, without a power supply connected
> > > :)
> >
> > Forgive me if you've already answered this question, but
> > have you tried a different battery?
> >
> > --
> > Thomas
> >
> > =====
> > Linux on ThinkPad 600 page:
> > http://panopticon.csustan.edu/thood/tp600lnx.htm
> >
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