Re: New Magazine

(no name) ((no email))
Sat, 27 Aug 1994 19:49:30 -0400 (EDT)

I recently aquired a PC-1701 Ultralite for a price that was about right,
($125.00 us). Along with the "laptop" (yes it fits on my lap, but that's
about it), the seller provided me with a list of info regarding the 1701 and
1702.
One detail that you all are probably aware of is the $100.00 "battery
deal". In case you don't know, this means that NEC will send you 100 bucks
along with the new nickle metal hydride battery in exchange for the old one.
The old one must be the original type, meaning not nickle hydride, also
know as the "exploding battery" :). So, the guy who sold it to me had a
bunch of these computers which he bought cheap (I suspect), sent the
batteries to NEC and made out like a bandit. I would have done the same
thing if I were him.
Anyway, to get to the point, I experiment with electronics, I am a
"hardware hacker", if you will, so I built my own charger and power supply to
go with the machine. As far as I know, the reccommended charge current for
the older battery is about 50 milliamps, using this current I get about 3
minutes out of the new battery after a 16 hour charge, I increased the
charge current to 100 ma. and get now 45 minutes or so
(it's supposed to be 2 hours).
I changed a resistor value in the charger. I can not be liable for any
damage that may occur if you change things in your charger. I can only
relate what I did. It is my suspiscion that the newer type battery requires
more charge current than the original type. I am attempting to build an
external battery charger which will charge the battery out side of the
computer (gee, why didn't they think of that?). If there is much interest in
plans for this I can post them. However, I still have a bit of "R and D" to
do on it, when I get it worked out, I'll post it to the list, thanks for
reading.

Frank