i've tried them all. the original batteries camae with A123 cells in them. then that same style battery case design came with different blue colored cells(forget brand). when the dcb361 came out, it came with red battery cells(sanyo?) that had a higher ah rating, but dewalt to decided to fill only half the battery with these new cells. if you open up the dcb361, you'll notice half the cells are just black plastic spacers. with the dcb360, there are no empty spaces. they have twice as many cells inside vs the dcb361.