Bests & Worsts Reviews from Amazon

I've used Dremel tools for over 15 years now. I've mainly stuck with the corded ones, as the battery-powered versions tended to run out of charge quickly, had less RPM, were generally heavier and usually had a lot less torque. The lithium version has none of these drawbacks. Because there's no cord it's more comfortable to hold (and much more convenient to use!), about the same weight as a corded model, and has plenty of RPMs and torque. Battery lifetimes are very good, and the "fuel gauge" seems to be reasonably accurate. (Exactly how long a charge will last depends greatly on what you're using it for--working on balsa wood uses a lot less power than, say, grinding metal.) Battery charge times are quite short, about three hours to charge a completely empty battery. (But thanks to a "smart charger" it should only take a few minutes to charge it after a typical job.) An added bonus is that lithium batteries hold their charges practically forever, so there's no need to "trickle charge" them; just charge it back up after you're done with it and put it away, and it'll be ready to use the next time you need it. The only nit I've found so far is the need to remove the battery to charge it. (This is probably for safety's sake.) It'd be slightly more convenient to just put the whole unit in the charger after use, but since it doesn't need charging that often this is really minor. I'd consider this to be an entirely practical replacement for a corded Dremel. For everything I use my Dremel for (mostly small models plus the occasional home repair task) this one seems more than adequate. It's a sturdy unit that should last a long time. My one concern about lifetime is how long the lithium battery will last; only time will tell.