Soldering Coin Cell Batteries

[kd1na]

Two times I directly soldered wires to coin cell batteries only to have a strange thing happen when replacing the spent batteries.

When replacing the spent battery I noticed a strange discoloration on the battery next to where it was soldered. It looked like some king of powder. when I touched the battery with my hot soldering iron to remove the wire there was a loud band and flash from that discolored area of the battery.
I now use the proper holder for the coin batteries and no problems.

73 and Merry Christmas
Dave KD1NA
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