I don't mind the price of the 9ah & 5ah but the compact batteries have crazy high price per capacity. A 2.5 or 3ah compact m18 would be sweet for like $35-40. 8ah for $ 100 can be had now, but only as a ryobi 4ah 2pk, lol. I use the 9ah on saws, 5ah for drill & compact for impct drvr usually.