The smallest cordless one to get is the 18v one.
A 12v one works okay but considerably slower at cutting.
The kind of tool where there fantastic at certain jobs, I have a 12v aeg one, great but slow. I prefer to use other tools then a multitool to finish the job off when another tool won't do the job.
There's enough adaptors going round to convert between all the different types of blades except dremel. They have a unique fitment.
