Lombard Battery Charging
#1
Posted 13 August 2008 - 06:58 PM
Windows PCs: Thinkpad T61, Dell Latitude E4310
#3
Posted 13 August 2008 - 07:45 PM
#4
Posted 13 August 2008 - 08:08 PM
Windows PCs: Thinkpad T61, Dell Latitude E4310
#5
Posted 13 August 2008 - 09:38 PM
Windows PCs: Thinkpad T61, Dell Latitude E4310
#6
Posted 13 August 2008 - 11:14 PM
http://www.maclife.c...s/topic/51129/1
and
http://www.macintouc...laptopbatt.html
but this somehow caused me to have to reinstall 10.3.9 a bit sooner than I had planned. Anyway,...
Like your experience, when the machine was running from AC and the pack was inserted, the pack was not recognized. I then removed and reinserted the pack several times in succession; I am not sure but I think I got the symbol to change from the battery with an X inside to a battery with a plug symbol inside. But never the battery outline with the squiggle inside that indicates charging and certainly never any non zero capacity available indication. When next as an experiment I pulled the AC plug the machine continued to run on the non recognized but somehow existent battery! I let it run until it slept, plugged in the AC adaptor and recharged it which seemed to reset the gas gauge and started proper recognition. After a few such cycles I am getting 2 hrs 25 minutes of surfing with the airport card enabled from a $2 investment in scrap batteries.
The suggestion to short out the + and - leaves me a bit in shock, although I note with the pack out of the machine there appears to be some kind of protective disconnect going on, no volts on the outer terminals, at least with my particular version of the smart circuits (there are at least two variants of the pack internal power manager electronics).
Edited post: Previous link to laptop lithium fire removed, it has been corrupted with an ad server overlay at least for now. Anyway, although many internet lithium fire pictures are thought to be hoaxes, I have found technical reports explaining and verifying that above approximately 130 deg C spot internal temperature the cell chemistry goes exothermic, and nothing can stop it from there. This is good reason to respect the lithium ion cell spec sheet limits on current and voltage, not just in normal use, but also in momentary bench experiments.
SE/30, PB1400c, PMG3DT, PBG3-400 Firewire, Pismo
#8
Posted 14 August 2008 - 04:16 AM
SE/30, PB1400c, PMG3DT, PBG3-400 Firewire, Pismo
#9
Posted 15 August 2008 - 04:54 PM
Now, I haven't tried this myself, so I'm only passing on what I've heard. But what I've heard is that it's best to do this through a resistor, so the battery discharges slowly and doesn't heat up (nor does your wire). A nice fat 10W power resistor should do, or a 12V light bulb. Even a mains power light bulb would work, preferably a nice bright (100W?) one.there is a way to reset the battery power manager. Take a wire and short both the + and - terminals. It will short out the power manager and reset it.
have you searched? Seeks: Nubus PDS DSP PB170 Newton; TRS-80 III/4; CBM BBC SX-64 CX5M Likes: 8bit luggable palmtop terminal NC tablet audio MIDI analog FM drum synth steam&dieselpunk; 1930-1980 lab/comm/mil Score! NC100 PB190 Q950 IIe-PDS
#10
Posted 15 August 2008 - 04:56 PM
Now, I haven't tried this myself, so I'm only passing on what I've heard. But what I've heard is that it's best to do this through a resistor, so the battery discharges slowly and doesn't heat up (nor does your wire). A nice fat 10W power resistor should do, or a 12V light bulb. Even a mains power light bulb would work, preferably a nice bright (100W?) one.there is a way to reset the battery power manager. Take a wire and short both the + and - terminals. It will short out the power manager and reset it.
The goal isn't to drain the battery. it shorts it out within like a quarter of a second. it will stop the flow to the contacts. you just want to crash the power manager in the battery. It's not going to start a fire or make the wire flame out. I did this several times with many batteries that have power managers, and it seems to reset the battery's power manager and gives it a cold-reboot
#11
Posted 15 August 2008 - 05:23 PM
have you searched? Seeks: Nubus PDS DSP PB170 Newton; TRS-80 III/4; CBM BBC SX-64 CX5M Likes: 8bit luggable palmtop terminal NC tablet audio MIDI analog FM drum synth steam&dieselpunk; 1930-1980 lab/comm/mil Score! NC100 PB190 Q950 IIe-PDS
#12
Posted 15 August 2008 - 06:54 PM
Date: Thu, 10 Jul 2003 10:49:58 -0600
From: Swift
Subject: Powerbook G4 Battery Resuscitation
I too had a battery that my Titanium Powerbook G4 failed to acknowledge even tho the level lights showed a fully charged battery. Resetting the PMU did nothing- went to the Genius bar and they swapped it into their Powerbook but it still failed to be recognized. / I decided instead to fully discharge the battery to reset its internal power management chip but since no Powerbook would recognize it, I removed it and carefully wired in a 12 volt car tail light bulb. Ran it overnight- then placed into my powerbook and it has worked flawlessly for the past 2 months. (I also found that you cannot hook it to a "power hungry" 12 volt appliance because the internal power manager will not let it be drained too quickly.)
That's from the macintouch page linked previously.
So from this I take it that the object is to drain the battery completely to nothing, whereupon the internal IC has brain failure and forgets everything.
I'm not trying to start an argument or disagreeing: I'm researching what to do about my own battery and I'm interested in your comments.
Note: a short circuit through a wire would for def count as a "power hungry" load.
have you searched? Seeks: Nubus PDS DSP PB170 Newton; TRS-80 III/4; CBM BBC SX-64 CX5M Likes: 8bit luggable palmtop terminal NC tablet audio MIDI analog FM drum synth steam&dieselpunk; 1930-1980 lab/comm/mil Score! NC100 PB190 Q950 IIe-PDS
#13
Posted 15 August 2008 - 07:35 PM
and it seems to reset the battery's power manager and gives it a cold-reboot
I decided to wipe to drive and install OS9 so I could run the battery reset program. I did that and the machine still would not recognize that battery. I reinstalled OSX and that as well did not help. The machine says that there is nothing in the bays. I even have an old dead battery. It as well is not recognized.
Windows PCs: Thinkpad T61, Dell Latitude E4310
#14
Posted 15 August 2008 - 09:05 PM
SE/30, PB1400c, PMG3DT, PBG3-400 Firewire, Pismo
#15
Posted 15 August 2008 - 09:31 PM
Try the battery in the right hand expansion bay with the machine first running on AC also, and again ignore the status icon and just pull AC power to see if the Lombard switches over to battery power.
Did that already. The machine runs briefly on battery and then shuts off.
Windows PCs: Thinkpad T61, Dell Latitude E4310
#16
Posted 15 August 2008 - 11:16 PM
SE/30, PB1400c, PMG3DT, PBG3-400 Firewire, Pismo
#17
Posted 15 August 2008 - 11:34 PM
Windows PCs: Thinkpad T61, Dell Latitude E4310
#18
Posted 15 August 2008 - 11:52 PM
But before that, it would not hurt to leave it plugged in even if not properly recognized and see if it gets any gradual charging over several days time-perhaps the gas gauge is just lying and the battery nearly empty for all previous tests.
I left the machine plugged in with the battery in for a short time and now I have all four dots on the battery lighted instead of three. The battery seemed to charge up more. It still is not recognized and will not boot from the battery even with the pram battery disconnected.
Windows PCs: Thinkpad T61, Dell Latitude E4310
#19
Posted 16 August 2008 - 12:23 AM
SE/30, PB1400c, PMG3DT, PBG3-400 Firewire, Pismo
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users










