Pedro, I still have both NiCad and LI tools that I use in my shop and you are right, the new 20 volt LI tools are lighter and a good bit more powerful than the older 14 and 18 volt NiCad tools. Do the tools you got have the brushless motors? I have been really wanting to try one out, but the tools I have are still in perfect working order so I can not justify spending more to just do the same work.