How are you supposed to connect to a button cell battery? Why is soldering to one so dangerous?



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BobbyK31 year ago

i soldered one but it never exploded just went very high temperature but I also found a way to keep the temperature normal you just have to get something that is a cool thing like a blow dryer but on the cold/cool mode or something that does the same thing to keep the batteries from overheating and exploding.

yeah I soldered one of these batteries a few days ago and it exploded and part of it flew in my eye, I'm not a very experienced solderer but still I wouldn't do it

hjartland (author) 6 years ago
Awsome! Thanks for the answers!
framistan6 years ago
I soldered a button cell once... ONCE!!!! It exploded almost immediately. Not a big explosion... but i dont like things to explode in my face, so that will be the last one i ever solder. I have soldered hundreds of nickel cadmium batteries and never had any of those explode.
blkhawk6 years ago

You can safely use a coin battery holder for your project.
orksecurity6 years ago
As others have said: Spring contacts. Simplest is to buy a battery holder (cheap, but sometimes be a bit hard to track down for a given battery size), but of course you can kluge your own.
frollard6 years ago
Thing is with lithium batteries, once you get them hot enough, they self destruct in a firey doom. They are a class D metal oxidizing -- and you CAN'T stop them with any but the most exclusive fire extinguishers that even some fire departments only carry a few of, since they're so rare.

You can put an ignited lithium battery in a hole and bury it with sand, and it will continue to burn. SO...do you WANT to get the contents of the battery hot? no.
Kiteman6 years ago
You connect like any other battery - by touching it with conductive things.

Dangerous? I think it's the heat - cook the contents, they'll expand, possibly boil, and that bursts the cell, spraying toxic, corrosive nastiness all over your bench / face / best shirt.

I don't know where you got the idea that soldering to a button cell battery is dangerous. It'll probably just explode is all. It's no big deal if you're wearing safety glasses.

Well actually, I don't know if they explode or not, but cooking them with a soldering iron probably does not improve their ability to deliver DC. 

Old computer motherboards are a good place to find an old CR2032 battery holder, but that's really kind of a fancy-pants way to go, when you can use some combination rubber bands, or metal springs, or alligator clips, or  duct tape, or something...  Just as long as you've got metal contacts held firmly against the coin cell somehow.
Do you have any clothespins?
;-)
clothespin-battery-holder.jpg