These are very small, almost seem too small to work, however they certainly do!
Very lightweight, the battery is tiny, yet very powerful. Particularly useful when doing lots of work on walls / overhead, this is less than half the weight of my old green badge Bosch. I know there is a 10.8v Bosch in the pro range that is similar price to this and rated very highly by pros, I got this one over the Bosch for no special reason, but I like it a lot.
The only difference a 10.8v battery makes over 18v or 24v that I can see is how long it lasts as opposed to power, however I have used one for a week without recharging, and with two batteries not a problem anyway.