Lithium-ion batteries are usually used for laptop batteries.
They are difficult to weld, which is why they need spot welding of Transformers.
But today I bought you a solution for welding 3.
7 v lithium ion battery.
Materials required for welding (
You can buy it at the hardware store, or you can make it yourself by cutting the tip and rubbing tip on the oilstone or concrete)
View the old iron wire (
Best copper wire)
By placing solder on the battery label, see image heat battery label for 10 seconds.