NiMH Rechargeable Battery Repair
 

Sorry for crosspost but r.b.e doesn't seem to see much traffic these days.

I am trying to rebuild several old handheld VHF battery packs that seem no
longer commercially available. The radios themselves seem fine and are
certainly OK for my application. I took the batteries apart and tried a
temporary fix with standard alkaline AA cells, taping aluminum foil in place
to make series connections. The radios seemed to like this so I bought a
quantity of the corresponding NiMH rechargeable AA cells to make a permanent
repair.

Problem is I am not at all sure how to secure a conductor from "plus" to
"minus" with the cells to make a strong and long-lasting series connection.
Is there some kind of conductive adhesive or conductive film that can be
used for this application? Larry, where are you when we need you (weak
humor)?

--
Good luck and good sailing.
s/v Kerry Deare of Barnegat
http://home.comcast.net/~kerrydeare

NiMH Rechargeable Battery Repair
 

On Sat, 15 Mar 2008 06:43:33 -0400, "Armond Perretta"
wrote:

Sorry for crosspost but r.b.e doesn't seem to see much traffic these days.

I am trying to rebuild several old handheld VHF battery packs that seem no
longer commercially available. The radios themselves seem fine and are
certainly OK for my application. I took the batteries apart and tried a
temporary fix with standard alkaline AA cells, taping aluminum foil in place
to make series connections. The radios seemed to like this so I bought a
quantity of the corresponding NiMH rechargeable AA cells to make a permanent
repair.

Problem is I am not at all sure how to secure a conductor from "plus" to
"minus" with the cells to make a strong and long-lasting series connection.
Is there some kind of conductive adhesive or conductive film that can be
used for this application? Larry, where are you when we need you (weak
humor)?

Buy cells with solder tags:
http://www.google.co.uk/search?sourc...mh+solder+tags
and find someone to solder them. NiMH need to be cycled quite a few
times until they reach full capacity so don't get disappointed too
soon. They also self-discharge quickly so recharge before use.

NiMH Rechargeable Battery Repair
 

Armond,

Try this group.

http://www.primecell.com/

I had my old handheld redone with a new NiMH battery and it has been fine
since.

Ansley Sawyer

NiMH Rechargeable Battery Repair
 

Armond,

I do this all the time. I have one on the bench right now waiting for
the new cells to come in. It is an old handheld VHF that the owner
loves which is good, because the repair will not be cost effective. (He
can buy a complete, NIB unit for a few dollars more than the quote.

Do not solder to the cells. This is a recipe for problems.

The only answer is to get on the web and find NiCad or NiMH (Lithium are
still hard to come by) with solder tabs all ready in place. Then you
can solder the tabs together or jumper between then to make up the
package.

If you can't find cells with solder tabs, the only other choice it to
use a micro size resistance welder.

Good Luck Guy

Matt Colie

Armond Perretta wrote:
Sorry for crosspost but r.b.e doesn't seem to see much traffic these days.

I am trying to rebuild several old handheld VHF battery packs that seem no
longer commercially available. The radios themselves seem fine and are
certainly OK for my application. I took the batteries apart and tried a
temporary fix with standard alkaline AA cells, taping aluminum foil in place
to make series connections. The radios seemed to like this so I bought a
quantity of the corresponding NiMH rechargeable AA cells to make a permanent
repair.

Problem is I am not at all sure how to secure a conductor from "plus" to
"minus" with the cells to make a strong and long-lasting series connection.
Is there some kind of conductive adhesive or conductive film that can be
used for this application? Larry, where are you when we need you (weak
humor)?

NiMH Rechargeable Battery Repair
 

"Ansley W. Sawyer" wrote in message
...
Armond,

Try this group.

http://www.primecell.com/

I had my old handheld redone with a new NiMH battery and it has been fine
since.

Ansley Sawyer



I used them recently. They seem to have returned a working unit... the good
news. However, their turnaround time was terrible, and they had very poor
response to email inquiries.

--
"j" ganz @@
www.sailnow.com

NiMH Rechargeable Battery Repair
 

"Armond Perretta" wrote in message
. ..
Sorry for crosspost but r.b.e doesn't seem to see much traffic these days.

I am trying to rebuild several old handheld VHF battery packs that seem no
longer commercially available. The radios themselves seem fine and are
certainly OK for my application. I took the batteries apart and tried a
temporary fix with standard alkaline AA cells, taping aluminum foil in
place
to make series connections. The radios seemed to like this so I bought a
quantity of the corresponding NiMH rechargeable AA cells to make a
permanent
repair.

Problem is I am not at all sure how to secure a conductor from "plus" to
"minus" with the cells to make a strong and long-lasting series
connection.
Is there some kind of conductive adhesive or conductive film that can be
used for this application? Larry, where are you when we need you (weak
humor)?


Use copper wire and solder it to the top and bottom's of the respective
batteries. The trick is to not get the battery ends too hot. Use one of
those fancy butane torches that have a tiny flame. They will melt and stick
the solder without harming the battery. Practice on a couple dead batteries
first to get your technique down. Use rosin core solder.

--
Gregory Hall

NiMH Rechargeable Battery Repair
 

Matt Colie wrote:


If you can't find cells with solder tabs, the only other choice it to
use a micro size resistance welder.


Perhaps silver loaded epoxy as used for chip assembly would work, I have
used it to repair car rear window heater traces.
Dick

NiMH Rechargeable Battery Repair
 

"Matt Colie" wrote
Do not solder to the cells. This is a recipe for problems.

I've soldered them successfully. It's definitely not a job for the
ham-handed, though, which is why the manufacturers tell you not to do it.
I've been buying cells from http://www.all-battery.com lately, btw. Pretty
good selection and price, tabbed and otherwise.

NiMH Rechargeable Battery Repair
 

Armond Perretta wrote:
Sorry for crosspost but r.b.e doesn't seem to see much traffic these days.

I am trying to rebuild several old handheld VHF battery packs that seem no
longer commercially available. The radios themselves seem fine and are
certainly OK for my application. I took the batteries apart and tried a
temporary fix with standard alkaline AA cells, taping aluminum foil in place
to make series connections. The radios seemed to like this so I bought a
quantity of the corresponding NiMH rechargeable AA cells to make a permanent
repair.

Problem is I am not at all sure how to secure a conductor from "plus" to
"minus" with the cells to make a strong and long-lasting series connection.
Is there some kind of conductive adhesive or conductive film that can be
used for this application? Larry, where are you when we need you (weak
humor)?

--
Good luck and good sailing.
s/v Kerry Deare of Barnegat
http://home.comcast.net/~kerrydeare

Hi, Armond, and group,

I took another device to Batteries Plus. Having already opened the
case, they did them microweld/jumper/connection tags to the
appropriate batteries for only the cost of the batteries themselves.

I expect that would be a good solution to your dilemma...

HTH

L8R

Skip

Morgan 461 #2
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"You are never given a wish without also being given the power to
make it come true. You may have to work for it however."
(and)
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hands. You seek problems because you need their gifts."
(Richard Bach, in The Reluctant Messiah)

NiMH Rechargeable Battery Repair
 

"Skip Gundlach" wrote in message
...


Armond Perretta wrote:
Sorry for crosspost but r.b.e doesn't seem to see much traffic these
days.

I am trying to rebuild several old handheld VHF battery packs that seem
no
longer commercially available. The radios themselves seem fine and are
certainly OK for my application. I took the batteries apart and tried a
temporary fix with standard alkaline AA cells, taping aluminum foil in
place
to make series connections. The radios seemed to like this so I bought a
quantity of the corresponding NiMH rechargeable AA cells to make a
permanent
repair.

Problem is I am not at all sure how to secure a conductor from "plus" to
"minus" with the cells to make a strong and long-lasting series
connection.
Is there some kind of conductive adhesive or conductive film that can be
used for this application? Larry, where are you when we need you (weak
humor)?

--
Good luck and good sailing.
s/v Kerry Deare of Barnegat
http://home.comcast.net/~kerrydeare

Hi, Armond, and group,

I took another device to Batteries Plus. Having already opened the
case, they did them microweld/jumper/connection tags to the
appropriate batteries for only the cost of the batteries themselves.

I expect that would be a good solution to your dilemma...


These posts **** me off. Whatever happened to self-reliance? Everybody but
myself's answer is to pay somebody else to do a simple job. Yes pay what a
battery costs to get somebody else to do what you should be able to do
yourself. Are there any REAL men left in the world anymore or are there just
lazy bums with more money than skill or sense?

--
Gregory Hall