5 Jun
2008
5 Jun
'08
8:23 p.m.
The batteries in my MicroVaxen need to be replaced. A couple of questions:
What's the best way to clean up corrosion damage caused by these batteries? With
Alkaline batteries, I usually use vinegar (since alkalines leak a base, not acid). What
about NI-CD?
What types of batteries can these be replaced with? I'm assuming that this is a NI-CD
battery pack. I went to Radio Shack expecting to simply find a cordless phone battery that
I could use to replace it - the pack appears to be nothing more than three AAA NI-CD cells
in series. Unfortunately, the only sort of phone batteries they carry are either too big
(AA's) or NIMH. I wouldn't imagine that it would work, but is it possible to use
NIMH batteries to replace the original pack? I ended up buying a small pack at Target,
it's a small, three cell (half or third AA, it appears), phone battery pack. NI-CD,
400mAh. But, you know, I'd like to know what my options are for the other
MicroVaxen...
Thanks!
-Ian
5 Jun
5 Jun
8:59 p.m.
On Thursday 05 June 2008 20:23, Mr Ian Primus wrote:
The batteries in my MicroVaxen need to be replaced. A
couple of questions:
What's the best way to clean up corrosion damage caused by these batteries?
With Alkaline batteries, I usually use vinegar (since alkalines leak a
base, not acid). What about NI-CD?
Those also use an alkali for an electrolyte, as I found out the hard way
once.
What types of batteries can these be replaced with?
I'm assuming that this
is a NI-CD battery pack. I went to Radio Shack expecting to simply find a
cordless phone battery that I could use to replace it - the pack appears to
be nothing more than three AAA NI-CD cells in series. Unfortunately, the
only sort of phone batteries they carry are either too big (AA's) or NIMH.
A battery speclalty store would be able to help you easier, like batteries
plus for example. What they don't stock they can order in and they have the
setup to make up packs, or at least the couple of them I've been in.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
9:12 p.m.
The batteries in my MicroVaxen need to be replaced. A
couple of
questions:
What types of batteries can these be replaced with?
I'm assuming that
this is a NI-CD battery pack. I went to Radio Shack expecting
to simply
find a cordless phone battery that I could use to replace it - the pack
appears to be nothing more than three AAA NI-CD cells in series.
Unfortunately, the only sort of phone batteries they carry are either
too big (AA's) or NIMH. I wouldn't imagine that it would work, but is it
possible to use NIMH batteries to replace the original pack?
Not likely. NiCd and NiMH have different charging procedures. NiCd
cells aren't hard to find; Digikey or Jameco are possibilities.
paul
10:57 p.m.
The batteries in my MicroVaxen need to be replaced. A couple of questions:
What's the best way to clean up corrosion damage caused by these
batteries? With Alkaline batteries, I usually use vinegar (since
alkalines leak a base, not acid). What about NI-CD?
The electrolyte in a NiCd cell is also alkaline (potassium hydroxide
based, I think). So you use a (chemically) weak acid for clean-up. I
normally used a solution of citric acid, it smells nicer than vinegar :-)
What types of batteries can these be replaced with? I'm assuming that
this is a NI-CD battery pack. I went to Radio Shack expecting to simply
find a cordless phone battery that I could use to replace it - the pack
appears to be nothing more than three AAA NI-CD cells in series.
Tht sounds very liekly.
Unfortunately, the only sort of phone batteries they
carry are either
too big (AA's) or NIMH. I wouldn't imagine that it would work, but is it
Do you not have space for the AA size cells? I didn't think MicroVAXen
were that tightly packed...
possible to use NIMH batteries to replace the original
pack? I ended up
buying a small pack at Target, it's a small, three cell (half or third
AA, it appears), phone battery pack. NI-CD, 400mAh. But, you know, I'd
like to know what my options are for the other MicroVaxen...
I've not tried it myself, but I've heard of plenty of people using NiMH
cells is old HP handheld calculators (designed to use NiCd packs) with no
problems, keeping the original trickle-charging circuit. My guess is that
an NiMH pack would be fine in the microVAX too.
-tony
6 Jun
6 Jun
5:49 p.m.
The use of NiMh's has a 'minor' drawback the internal powerloss is much
larger then when you use NiCad's.
The use of the pack is memory backup for some setup/boot settings.
The uVax runs very well without the batteries the only drawback is you have
to do the setup at every new powerup....
For nowmal operation you do not need the batteries.
Rik
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Tony Duell
Verzonden: vrijdag 6 juni 2008 4:57
Aan: cctalk at classiccmp.org
Onderwerp: Re: MicroVax batteries
The batteries in my MicroVaxen need to be replaced. A couple of questions:
What's the best way to clean up corrosion damage caused by these
batteries? With Alkaline batteries, I usually use vinegar (since
alkalines leak a base, not acid). What about NI-CD?
The electrolyte in a NiCd cell is also alkaline (potassium hydroxide based,
I think). So you use a (chemically) weak acid for clean-up. I normally used
a solution of citric acid, it smells nicer than vinegar :-)
What types of batteries can these be replaced with? I'm assuming that
this is a NI-CD battery pack. I went to Radio Shack expecting to
simply find a cordless phone battery that I could use to replace it -
the pack appears to be nothing more than three AAA NI-CD cells in series.
Tht sounds very liekly.
Unfortunately, the only sort of phone batteries they
carry are either
too big (AA's) or NIMH. I wouldn't imagine that it would work, but is
it
Do you not have space for the AA size cells? I didn't think MicroVAXen were
that tightly packed...
possible to use NIMH batteries to replace the original
pack? I ended up
buying a small pack at Target, it's a small, three cell (half or third
AA, it appears), phone battery pack. NI-CD, 400mAh. But, you know, I'd
like to know what my options are for the other MicroVaxen...
I've not tried it myself, but I've heard of plenty of people using NiMH
cells is old HP handheld calculators (designed to use NiCd packs) with no
problems, keeping the original trickle-charging circuit. My guess is that
an NiMH pack would be fine in the microVAX too.
-tony
7 Jun
7 Jun
12:41 a.m.
From: ard at p850ug1.demon.co.uk
---snip---
I've not tried it myself, but I've heard of plenty of people using NiMH
cells is old HP handheld calculators (designed to use NiCd packs) with no
problems, keeping the original trickle-charging circuit. My guess is that
an NiMH pack would be fine in the microVAX too.
Hi
I still think it is easier to find NiCads for portable phones.
They may not be the same form factor but usuallt come in three
cell stacks with longer leads. I like to place them in a bagie
in case they leak so the leads come in handy.
The most common I've seen is three cells in a triangle pattern.
These work fine.
Dwight
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ard＠p850ug1.demon.co.uk -
dkelvey＠hotmail.com -
dr.emiel＠xs4all.nl -
eric＠brouhaha.com -
ian_primus＠yahoo.com -
Paul_Koning＠Dell.com -
rtellason＠verizon.net