I'm using dcf890, 3/8 impact, Dcf894 1/2 impact, dcd709 drill, dcs354 multi-tool, dcs369 saw, plus several others, with no problems, all work well,,use 2 2a, 1-4a,and 1-9a batteries also no problems. The 9 is a 20/60amp lasts very long, even with a chain saw. ... Login to read more.