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'[AD]: Connectors for NiMH batteries recently obtai'
2001\06\11@170624 by Bob Ammerman

picon face
I have found a source for the connectors that match the NiMH batteries
recently given away to PICLIST members.

These connectors are a 2.5mm pitch right-angle, thru-hole PC-board mount.
(They fit fine into 0.1" spaced holes).

The minimum order quantity is 1000 units at US $ 50.00 per 1000 (ie: US
$0.05 per each).

If I can get enough interest, I would be willing to purchase 1000 and resell
them at cost ($0.05 each), plus actual shipping cost and $4.00/order
"handling".

Please respond by direct eMail to: spam_OUTrammermanTakeThisOuTspamprodigy.net if you are
iterested.

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)

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2001\06\11@201426 by James Newton. Admin 3

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I'm in for 200 @ 0.05 = $10 + $4 + shipping on my FedEx number.

Does anyone have a source for a ready made battery charger that will work
with the individual cells after they are broken out of the packs? They have
no nub on the positive side and so won't work in the standard NMH "Renewal"
unit. My Palm Pilot is getting hungry.

James Newton, PICList Admin #3
.....jamesnewtonKILLspamspam@spam@piclist.com
1-619-652-0593 phone
http://www.piclist.com

{Original Message removed}

2001\06\12@041217 by Roman Black

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face
James Newton. Admin 3 wrote:
>
> I'm in for 200 @ 0.05 = $10 + $4 + shipping on my FedEx number.
>
> Does anyone have a source for a ready made battery charger that will work
> with the individual cells after they are broken out of the packs? They have
> no nub on the positive side and so won't work in the standard NMH "Renewal"
> unit. My Palm Pilot is getting hungry.


James, if you lightly sand the flat positive end
to scar the nickel plating a bit it will solder
well, then just put a solder "tit" on the end
of the battery to replace the positive bump
that is not there.

We have done this many times with 100% success,
and even with some non-standard Asian batteries
where the bump is too small (out of spec) and
we have to fix them before use.
-Roman

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2001\06\12@090642 by Olin Lathrop

face picon face
> Does anyone have a source for a ready made battery charger that will work
> with the individual cells after they are broken out of the packs? They
have
> no nub on the positive side and so won't work in the standard NMH
"Renewal"
> unit. My Palm Pilot is getting hungry.

No, but I'm working on something that will charge 5 or 8 packs at the same
time.  However, I plan on using the packs as they are.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olinspamKILLspamembedinc.com, http://www.embedinc.com

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2001\06\12@090647 by Olin Lathrop

face picon face
> James, if you lightly sand the flat positive end
> to scar the nickel plating a bit it will solder
> well, then just put a solder "tit" on the end
> of the battery to replace the positive bump
> that is not there.

If you are going to do this, be very careful about heating the battery.  The
battery can be destroyed by solder temperatures.  That's why most permanent
connections to these batteries are tack welded instead of soldered.  When
you take a pack apart (I haven't done this) I bet you see interconnects that
are tack welded metal strips, not soldered.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, .....olinKILLspamspam.....embedinc.com, http://www.embedinc.com

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2001\06\12@093907 by M. Adam Davis

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face
The major problem is that either end of the cell (or perhaps just one
end) may have vents, gaskets, and other materials which are sensitive to
high heat.  While you may not destroy the battery, you will almost
always degrade these materials causing the battery to lose much of its
useful life(improper venting, ruined electrolyte, etc).  It's also worth
mentioning here that unless you get the terminal up to solder
temperature, you are only forming a cold solder joint, which will also
degrade over time until it too fails.

Try to save the tab if you can, and solder to that.  Alternately, use a
battery holder.  They aren't that expensive, nor do they take up that
much extra room.

-Adam

Olin Lathrop wrote:

{Quote hidden}

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2001\06\12@102328 by mike

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On Tue, 12 Jun 2001 08:00:06 -0400, you wrote:

>> James, if you lightly sand the flat positive end
>> to scar the nickel plating a bit it will solder
>> well, then just put a solder "tit" on the end
>> of the battery to replace the positive bump
>> that is not there.
>
>If you are going to do this, be very careful about heating the battery.  The
>battery can be destroyed by solder temperatures.  That's why most permanent
>connections to these batteries are tack welded instead of soldered.  When
>you take a pack apart (I haven't done this) I bet you see interconnects that
>are tack welded metal strips, not soldered.
I'd agree with this - it is possible, but you need to be careful. File
the plating off to make a good surface, and use a POWERFUL (but not
excessively hot) iron, and the SHORTEST time - a low-power iron will
take much longer to heat the joint sufficiently, potentially causing
more damage. You should be aiming to be applying the iron for no more
than 2-3 seconds. Metcal irons with the bigger bits are perfect for
this type of work as they can dump lots of power into the joint
quickly without temperature overshoot.

Applying some flux to the battery surface first also helps speed
things up.
With practice, it's not hard to solder to batteries without damage,
but it's always better to use tabs if they're already there.
Another alternative, which works well, especially for coin cells,   is
conductive epoxy.

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2001\06\12@112534 by Dale Botkin

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On Tue, 12 Jun 2001, Olin Lathrop wrote:

> > James, if you lightly sand the flat positive end
> > to scar the nickel plating a bit it will solder
> > well, then just put a solder "tit" on the end
> > of the battery to replace the positive bump
> > that is not there.
>
> If you are going to do this, be very careful about heating the battery.  The
> battery can be destroyed by solder temperatures.  That's why most permanent
> connections to these batteries are tack welded instead of soldered.  When
> you take a pack apart (I haven't done this) I bet you see interconnects that
> are tack welded metal strips, not soldered.

Quite true.  I recommend as shor a time as possible, which ideally means a
high-mass, high wattage soldering iron.  "Ideal" in this case means "other
than using a spot welder", of course.

Dale
--
A train stops at a train station.  A bus stops at a bus station.
On my desk I have a workstation...

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2001\06\26@222818 by Bob Ammerman

picon face
As I mentioned a week or two ago:

> I have found a source for the connectors that match the NiMH batteries
> recently given away to PICLIST members.
>
> These connectors are a 2.5mm pitch right-angle, thru-hole PC-board mount.
> (They fit fine into 0.1" spaced holes).
>
> The minimum order quantity is 1000 units at US $ 50.00 per 1000 (ie: US
> $0.05 per each).

> If I can get enough interest, I would be willing to purchase 1000 and
resell
> them at cost ($0.05 each), plus actual shipping cost and $4.00/order
> "handling".

I have just ordered a couple thousand. After distributing them to  those who
have already requested them I will have some left over.

If you would like some then please respond by direct email to:

rammermanspamspam_OUTprodigy.net

First come, first serve.

Thanks,

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)

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'[AD]: Connectors for NiMH batteries recently obtai'
2001\07\04@124713 by Bob Ammerman
picon face
If you would like some then please respond by direct email to:

@spam@rammermanKILLspamspamprodigy.net

First come, first serve.


=== I just received an order of two thousand of these.  After distributing
them to  those who have already requested them I will have some left over.
Since the post office is closed today, and I am going to be out of town
tomorrow and Friday, I will be mailing them off on Monday.

So... if you want some, please let me know ASAP.

I will accept payment via PayPal.

Cost is 0.05 per connector plus actual cost of shipping plus $4.00 per order
handling.

Thanks

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)


As I mentioned a week or two ago:

> I have found a source for the connectors that match the NiMH batteries
> recently given away to PICLIST members.
>
> These connectors are a 2.5mm pitch right-angle, thru-hole PC-board mount.
> (They fit fine into 0.1" spaced holes).
>
> The minimum order quantity is 1000 units at US $ 50.00 per 1000 (ie: US
> $0.05 per each).

> If I can get enough interest, I would be willing to purchase 1000 and
resell
> them at cost ($0.05 each), plus actual shipping cost and $4.00/order
> "handling".

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2001\07\04@130405 by jim

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Hey Bob,

How about 500 or so of the connectors?  Cost will then be....
(.05x500) + $4.00 +  $Shipping (~$5.00) = ~ $34.00 USD.
Is this correct?   If you can't meet this quantity, tell me what
you can supply.   Please advise.

                                                   Regards,

                                                       Jim
{Original Message removed}

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