"brass monkey" wrote in message
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"brass monkey" wrote in message
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"john hamilton" wrote in message
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I'm replacing a small button battery (CR 2032) with two AAA batteries,
I'm intending to leave the old discharged button battery in its place
and solder the leads from the AAA batteries directly on to the button
battery.

Is the heat that I would need to apply to the button battery with the
soldering iron to solder to it, likely to make the battery prone to
'leakage' in the future? Or perhaps cause it to go bang at the time of
soldering? Thanks for advice.

Why can't you just replace the 2032?
Or simulate one with 2 bits of tin-can and solder to those.

And what if the old battery has low internal resistance, and shorts out your
AAAs? It probably won't be easy to solder to anyway, aren't they nickel
plated?