This is not an old battery. It’s almost new. They only test for nickel. That’s why the price is very good
I can’t understand one word of Vietnamese but I recognize a good haul of cells when I see one. 
Are you getting e-bike battery packs? What do you mean when you said here that they only test for nickel?
I watched your video on rebuilding a Makita battery pack…good job there!
This is a new battery you can buy at the old battery price. They only check the quality of the weld, and the nickel
Open it in YouTube there is a link in the description
Oh…didn’t see that link. Thanks. Even better when someone else has done the cleanup and snipping for you!