generally in these situations you'd be replacing all the cells at once, so they are reasonably matched. Nobody tears apart a battery and resolders everything j

generally in these situations you'd be replacing all the cells at once, so they are reasonably matched. Nobody tears apart a battery and resolders everything just for one cell, that's a waste of time. and if you're really concerned about it, you can match cells for impedence yourself, but it's generally not a problem if you replace all the cells at once with cells of the same kind/batch/etc.