Here is a solution I'm going to do on mine. http://www.cyberroach.com/portamac/
On Apr 1, 2013, at 3:57 PM, Jason Johnson wrote: > When I don't want to use mine with battery I use a PowerBook 100 series plug > as its just higher amperage same voltage. I don't suggest 12 volts as no > input is higher than 9 volts (pram 9 volt battery). > > > Date: Mon, 1 Apr 2013 15:51:59 -0700 > > From: [email protected] > > Subject: Re: Macintosh Portable start-up problem > > To: [email protected] > > > > The Macintosh Portable had an odd power system. It always ran off the > > lead-acid battery. > > > > When plugged in, the AC adapter fed power to the battery while the computer > > was drawing it out. Woe betide the Portable owner who let the battery > > discharge too much! > > > > There are better lead-acid batteries that can withstand deeper discharge > > and there are ways to use other types of 12 volt batteries if you change > > the charging circuitry. > > > > Some people have de-portabled theirs by eliminating the battery and > > connecting a 12 volt AC adapter (with good regulation and filtering!) > > directly in place of the battery. > > > > -- > > -- -- -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
