I bought a couple cases (60/case) of Rayovac 844B 4.5v
alkaline computer
memory batteries, and may grab a couple more if anybody is interested in
Are these the ones used in Mac Plus, etc?
Yes, which machines use these? Just a few days ago, I found that
the little lithium batteries for a Quadra are $10 at Radio Shack,
but it was for a client. :-)
I "guess" this is serious FAQ material, but from a little digging I find
Apple has used maybe 5 basic types of memory backup, PRAM, or CMOS battery.
Classic macs
Battery Type: 4.5V alkaline, #523 This seems often listed as a Polaroid
battery.
By the SE/30 and maybe earlier, through the quadras
Battery Type: 3.6v lithium 1/2 AA, Tadrian TL2150 etc.
Around the time of the first performa power macs
Battery Type: 4.5V alkaline, Rayovac 840 or 841, square with leads.
Mac Portable uses a plain old 9v transistor radio battery.
Various portables used special modules etc.
Most of the newest macs now use PC style "button" lithium cells of various
sizes and types.
********************
So where does that leave the 844B that I now have 360 of?
486 era PCs are almost all compatible with the 844B
The 844B is twice as long as the square 840, and has twice the capacity.
Rayovac released it as a all purpose replacement for any systems that
currently used the same 4 pin connector from 3.6 volts to 9 volts. Not an
exact voltage match, but according to Rayovac it works. They come with both
sides of a velcro patch, so find a spot, peel off the protective film and
stick it on and plug it in.
$10 for 3, $20 for 10, plus actual shipping. Buy em while I have them,
since the people I am selling cases to I doubt will be offering anything
close to these prices.
