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Soldering @JPBel
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#21 (permalink)      12/28/2016 12:14:04 PM US Central   quote/reply + tips
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Vapor
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Plug your solder iron into a long extension cord (outside)... Sit the tip on a lithium button cell... plug the extension cord into a power outlet and observe from a long distance distance... After you see what that small cell is capable of hopefully it will give some insight on how to (or not to) handle a larger cell...

Edited on 12/28/2016 at 12:17 PM. Reason:
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#22 (permalink)      2/12/2017 1:07:46 PM US Central   quote/reply + tips
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RootedSuperuser
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NEVER, EVER solder to a battery BOTTOM.
Fast solders with a blast of compressed air to cool things down quickly can be done on button and flat TOPS! ONLY.
The core is in the center of the bottom and this is where you will damage the battery.
There is instructions from the factory advising where NOT to tack weld, regardless of soldering.
There are specific tabs made to prevent spot welding the center where the core of the battery is.

Edited on 2/12/2017 at 1:09 PM. Reason: