Many have written that "pure nickel" strips are nickel coated steel. To the best of my ability to distinguish, these do seem to be pure nickel. In any case, they spot weld beautifully. Am currently welding them to 18650 and 2650 LifePo4 cells and have not had any issues. Others have written that the pack was mixed with different kinds. I also have not found that to be true. This looks to be exactly as advertised.
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