[ltp] Battery dying

James Mckenzie linux-thinkpad@www.bm-soft.com
Thu, 01 Nov 2001 22:11:45 -0700


Thomas:

What type of battery does the 770Z use?  If it is a NiMH battery, you may have to
'deep cycle' it a few times to get all time back.  This is NOT recommended for LiON
batteries as this may shorten the lifetime further of the battery.

James Mckenzie

Thomas Porter wrote:

> On Thu, Nov 01, 2001 at 10:27:32PM -0500, Thomas Hood thoughtfully expounded:
> > PMO.  I just bought a new battery in July, and already it's dying
> > just as my last battery did.  When charging, after it charges to
> > about 20% it jumps up to "100%", and when I run on battery it
> > only runs down to about 85% before dropping suddenly to 5%.
> >
> > Is this a firmware bug, or what?
>
> Thomas,
>
> I have had similar problems.  Can you check something for me:  What is the time
> remaining when your battery charge level drops from 85% to 5%?
>
> I have found on mine that regardless of my usage pattern, and thus the
> percentage shown, that when the time remaining drops under one hour, from 1:00
> to 0:55, is when the battery goes critical.
>
> I too suspect some kind of system problem: charging circuit, firmware in
> battery, APM BIOS support, etc. and am trying to confirm this.
>
> --
> Tom Porter                                       txporter@mindspring.com
> ------------------------------------------------------------------------
> "On two occasions I have been asked [by members of Parliament],
> 'Pray, Mr. Babbage, if you put into the machine wrong figures, will
> the right answers come out?'  I am not able rightly to apprehend the
> kind of confusion of ideas that could provoke such a question."
>
> ----- The Linux ThinkPad mailing list -----
> The linux-thinkpad mailing list home page is at:
> http://www.bm-soft.com/~bm/tp_mailing.html


----- The Linux ThinkPad mailing list -----
The linux-thinkpad mailing list home page is at:
http://www.bm-soft.com/~bm/tp_mailing.html