[Elecraft] OT: soldering leads to coin cell batteries

[Dr. Werner Furlan]

hi John, 

John Ferguson schrieb am 19 Dec 2009 um 6:35:

> Does anyone here have experience soldering leads to coin cell batteries? My

yes I have :-(

> Compaq Armada M300 needs a new cmos battery.  the present one is a 2032
> with 2 leads and a molex plug.

> my scheme is to put the needle point on my trusty WTCP, remove the leads
> from the old battery, sand them and tin them and using the flux I used for
> the smt project, quickly as in QUICKLY touch the point to the leads.

I do not don't recommend it, although it might work. But it will heat up 
the battery and you must avoid by all means that solder flows around the 
edge of the battery and shortens it. When I once tried it the coin cell 
exploded in my fingers and since that time I know what tinnitus is. 

You might find the leaded cmos battery as a spare part or maybe you have a 
dealer around who has the equipment to weld leads to a coin cell. (we have 
such a dealer 30km away).
Another possibility: maybe you have enough room to insert a battery holder 
somewhere in the computer? 

73! de Werner OE9FWV



-- 
I made a mental note and now I can't remember where I put it!


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