i ment just to get the portable to boot.... remove the battery and it wont boot on its own off just the wall-wart.... bad design.... it needs both the battery (or a simulation thereof in this case the cheap second wallwart) to get started....
On 20/12/05, Gregg Eshelman <[EMAIL PROTECTED]> wrote: > --- Samual Acorn <[EMAIL PROTECTED]> wrote: > > > this may sound odd but i read somewhere that you can > > use a cheap > > wall-brick with the same output voltage as the > > battery a put it in > > place of the battery and plug the regular PSU in and > > it should power > > up (the wall brick will simulate the battery in > > order to trick the > > portable to boot.... great design eh?) > > The Portable always runs off the sealed lead-acid > battery. > Let it get too low and *pfft!* it's kaput. A modern > replacement > shouldn't be so sensitive. When plugged in, the > charger > circuit keeps topping up the battery as the Mac drains > it. > > Apple chose lead-acid because of the longer run time > it could > have VS the Nickle-Cadmium technology of the time. The > drawback > was higher weight and the sensitivity to too much > discharge. > > An interesting thing is that in most applications, > NiMH cells > can directly replace NiCd cells. They're the same > voltage but > NiMH has a higher energy density so it'll run things > longer. > A NiCd charger will work just fine on NiMH cells, it > just > takes longer than a higher rate charger designed for > NiMH cells. > Some "smart" chargers for NiCd may have problems where > they'll > shut down before NiMH cells are fully charged. > > Replacing lead-acid batteries with a bank of NiCd or > NiMH cells > is a bit of a problem since LA is 2 volts per cell and > the > others are only 1.2 volts. If the LA being replaced > has a > total voltage evenly divisible by 1.2, then use that > many NiCd > or NiMH cells to replace the LA. Be sure the amp-hour > or > miliamp-hour rating matches or exceeds the original LA > battery! > > It will be total Fandemonium! > August (Fri) 4th, (Sat) 5th & (Sun) 6th, 2006 > http://www.fandemonium.org > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > -- > Vintage Macs is sponsored by <http://lowendmac.com/> and... > > Small Dog Electronics http://www.smalldog.com | Enter To Win A | > -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> > --> AOL users, remove "mailto:"; > Send list messages to: <mailto:vintage.macs@mail.maclaunch.com> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For digest mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> > > iPod Accessories for Less > at 1-800-iPOD.COM > Fast Delivery, Low Price, Good Deal > www.1800ipod.com > -- --sam http://mephitus.renamon.org/ "When you've done something right, no one will be sure you've done anything at all." -- Futurama -- -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:vintage.macs@mail.maclaunch.com> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
