If you get the larger 4ah or 6ah packs, they have sets of cell in parallel. Each set is 5 cells in series(18v). 4AH packs have 2 sets in parallel, and a 6ah pack has 3 sets in parallel. That means each set of cells will discharge half as much current for a 4ah pack and 1/3 as much current for the 6ah pack. That means,…