I've seen so many videos, I apologizes if I can't any particulars to you.
The 709A arrived today, and came with (4) sample packs of strips, with labelled material, thickness, through current, and welding setting...
* 0.1 nickel plated iron, 1-3A, 3-4
* 0.15 nickel plated iron, 2-5A, 6-7
* 0.2 nickel plated iron, 2.5-8A, 8
* 0.15 pure nickel, 10-15A, 7-8
I've got some dead batteries that'll be used as test units, will update, yet suspect it'll be around the 4-spots @ power-7.