From: Tim Tyhurst (tim_at_dogmead.com)
Date: Wed Jan 03 2001 - 21:51:36 EST
Easy one first -- I just sent my reply to you, without copying the list.
Oops.
It's been a while (I no longer have my 760E) but my batteries would exhibit
behaviour similar to what you observe -- that is, they sometimes didn't drop
linearly to 0%, but would quit earlier.
I'm pretty sure that the computer wasn't suspending when doing a battery
changeover, so I think that would rule out (3).
If you don't have any battery in the option bay at all, does it draws power
OK from the battery in the main battery bay?
I have to say I'm inclined to think that it might be (2) or (4). Can you
warm-swap batteries when the unit is suspended, without the unit powering
off? If you can, that might rule out (4).
tim
-----Original Message-----
From: Bryan Biggers [mailto:bbiggers_at_charter.net]
Sent: Wednesday, January 03, 2001 8:36 PM
To: Tim Tyhurst
Subject: Re: Two battery operation
Tim, yes, it acts the same if I reverse the batteries. I just
tried it tonight, and it drew from the battery in the bay until
the system was just over 50% drained (about 52%), then it shut
off. If I turn it back on, it runs for a few seconds off the
battery in the bay then turns off again. The only things that I
can think of are that...
1) My batteries are too weak, and die early, but does it really
drain to 0% on your system? Mine usually quits at about 4% left.
Maybe it really wants to get to 0% to switch.
2) It is busted.
3) It goes into suspend for a second to switch, and mine is
disabled.
4) It uses the internal rechargable backup battery, and mine is
dead or bad.
Question, I sent my query to the list, but just switched to
individual messages instead of the digest. Your message appeared
to come right from you instead of the list, did you send it to me
or to the list or both? It will be a pain if all the messages
don't come from the list, then I can't put them in a folder.
Bryan
Tim Tyhurst wrote:
>
> I've used two batteries on a 760E, and it should indeed switch over and
use
> the other battery without any special user actions. As I recall, it will
> draw from the battery in the option bay first, and switch over to the main
> one.
>
> Do you get the same behaviour when you switch the two batteries?
>
> -----Original Message-----
> From: Bryan Biggers [mailto:bbiggers_at_charter.net]
> Sent: Wednesday, January 03, 2001 9:43 AM
> To: thinkpad_at_cs.utk.edu
> Subject: Two battery operation
>
> I have a 760ED. I'm not sure if it is working right when I put in
> two batteries or not, maybe someone who has one can tell me what
> is supposed to happen.
>
> When I put in a second (known good, charged) battery in the bay,
> the second battery indicator lights up. The machine shows about
> 2x the normal operating time in the fuel gauge, this looks good
> so far. Now the problem; when the remaining capacity gets down to
> 50%, the machine just shuts off! Duh, isn't it supposed to switch
> over and use the other battery? I'm wondering if this requires
> the use of one of the suspend or hibernation modes that I don't
> have enabled.
>
> Can anyone who has used 2 batteries tell me what is supposed to
> happen? Does the machine go into hibernation and you have to wake
> it up again to use the second battery? Is there any test that I
> should perform? Batteries will charge in both positions, by the
> way.
>
> Bryan
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