Dremels are great small toos for intricate work. They last forever and there are so many addons.

I have been using this model for years. This thing gets used daily, I install dozens of batteries per day and use it to clean corrosion off of the terminals as it gets in all the tight corners that traditional methods do not reach. I would like to point out that battery corrosion blows through the vents on the motor constantly, this thing is obviously rugged. I also use it for all kinds of random stuff like cutting through plastic and metal regularly. It always does the job.