My Dremel is as old as they come. Takes a small wrench to change out the bits, cord has been cut and sliced, loud as hell but still runs. I'm Leary about a cordless one. How long will the battery last, will they change the battery down the road where the tool is useless, am I going to forget the charger when I'm out on a job....etc etc. Anyone have a cordless and what are the pros and cons?