-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Wow..
This is exactly what I was looking for. Both Type IIIs do exactly what your 145's battery did. And although I bought the batteries used, one of the IIIs had *no marks* on the terminals, telling me it had either never been used, or only inserted/removed once (at most). Thanks. I'll give it a try.. what would be the cutoff on the "high current" power supplies? 1 amp? 2 amps? 3? 5? 30? Just curious, because I have several smaller RadioHack powersupplies lying around, most of them are <1 amp. Thanks a lot! - -Andy On Tuesday, February 26, 2002, at 10:35 AM, Greg wrote: > > >> Thanks for the tips so far... but one thing still bugs me: >> Any idea why both my Type IIIs trash the system? The PRAM is good (the >> whole thing is refurbished & in decent shape). I can't spend the $50 - >> $90 on a new battery (poor student syndrome :\ ). >> >> A dead battery wouldn't charge, right? (like the type II) it wouldn't >> kill the Duo.. right? >> > > I think we use the term "dead" too loosely, much like the terms "fried" > and "toast". In the case of primary batteries (non-rechargeable) dead > normally means depleted. In the case of rechargeable batteries dead may > mean depleted or it may mean it is worn out, i.e. cannot be recharged > any more. > > In the last case, the battery can be worn out in two different ways > generally. > 1) it may appear as a short circuit (or at least a very low resistance) > 2) it may appear as an open circuit (or at least a very high resistance) > > In the later, it may even charge to a normal or near normal voltage, but > exhibit a very small capacity. It may not be able to deliver current > quickly enough and/or enough of it. > > If you have the equipment, you might try a brief charge of the type II > or III batteries by connecting the Pos + terminal and the Neg - terminal > to the respective + and - terminals of some 12 volt DC source, such as a > wall wart type power supply or even your car battery. If you do the car > battery, make the connection quickly and briefly, i.e. a second or so. > Do this a few times, and you might burn off some dendrites that have > accumulated in the cells causing a problem. I have done this to > batteries that the computer can't charge. One was a brand new battery > for a PB-145b. It had been in the sealed box, but for many years. The > computer would crash (quit) every time the battery was inserted. It > would not even boot if the battery was already in it. A couple zaps to > the + and - terminals with a 15 volt high current power supply and it > was cured. Still works great and will run my 145b for slightly over 6 > hours, in the event of a power failure, (screen backlight off) acting as > my programmable, multiple setting, always on (24/7), running on RamDisk, > alarm clock, with voice announcements as the alarm. Boy, did I get > sidetracked or what! > > Greg > > ---------- > Duo/2400 List, The friendliest place on the Net! > A listserv for users and fans of Mac subportables. > FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> > Be sure to visit Mac2400! <http://www.sineware.com/mac2400> > > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to <DuoList- > [EMAIL PROTECTED]> > Need help from a real person? Try. <DuoList- > [EMAIL PROTECTED]> > > ---------- > Dr. Bott | 10/100 Ethernet for your 2400 is finally here! > MPC-100 | <http://www.drbott.com/prod/mpc100.html> > > RoadTools $30 PodiumPad available at Apple retail stores, $20 Traveler > CoolPad at Staples. Both in white for iBooks at <http://roadtools.com> > > Midwest Mac Parts ][ <http://www.midwestmac.com> > After-market parts for Macs. ][ 888-356-1104 ][ > > MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! > Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com> > - ----- "... I realized that when they [random people pulled from the streets] used the mouse, they were pointing. Pointing, and tapping the button with the finger they were pointing with ... there was no mental model for pointing with more than one finger. So we got rid of the two-button mouse ..." Larry Tesler of Apple Computer on the Lisa (and later Macintosh) mouse. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (Darwin) Comment: For info see http://www.gnupg.org iD8DBQE8e/Z56akgVXVbCzMRAu4wAJ9mZtc3BCcGmC3yd15VaePDugqBsACgkk/y EnCc15zUCDo9grITas7LHko= =zRDb -----END PGP SIGNATURE----- ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and fans of Mac subportables. FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> Be sure to visit Mac2400! <http://www.sineware.com/mac2400> To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> Need help from a real person? Try. <[EMAIL PROTECTED]> ---------- Dr. Bott | 10/100 Ethernet for your 2400 is finally here! MPC-100 | <http://www.drbott.com/prod/mpc100.html> RoadTools $30 PodiumPad available at Apple retail stores, $20 Traveler CoolPad at Staples. Both in white for iBooks at <http://roadtools.com> Midwest Mac Parts ][ <http://www.midwestmac.com> After-market parts for Macs. ][ 888-356-1104 ][ MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
