21 Oct
2004
21 Oct
'04
3:35 p.m.
On Oct 21, 2004, at 2:59 PM, Dwight K. Elvey wrote:
I won't charge them in the calculator, they are regular AA cells so I
can remove them and put them in a proper charger. :^)
From:
"Ron Hudson" <ron.hudson(a)sbcglobal.net>
I just got some HP calculators!
Now I have some questions :^)
--Anyone have a spare manual for either?
--Have pointers on replacing the battery pack on the 55?
(it seems to be 3 AAA nicads)
--Anyone have any pointers on cleaning up leaked nicad crystals?
what is that stuff anyway?
Most likely potasium hydroxide or similar base. You need to first
wash with water, then 50% mix of white distilled vinegar followed
by a rinse and dry.
I do have cases and power suplies.
-- I took apart the 25's battery pack and replaced the nicads with
nickel metal hydride cells (the same ones I use in my camera)
Not a good idea. Nickle metal hydrides need different types of
charging. The won't last long with a NiCad charging circuit.
-- Is is ok to run the 55 on wall power supply without a battery
pack installed?
Don't know. You should be able to find NiCads to replace.
Check out JameCo. Also, we have a place called Batteries Plus
that will weld together NiCad stacks.
Dwight
Will trade the 55+case+powersupply+leakybatteries(in a ziplock bag)
for complete set of docs for the 25 + 1 good application book,
preferably games :^)