Went and bought one after the recommendations here.
I've only been playing about with it so far but not sure its sounding to
healthy.
It sounds like my old cordless drill when it has reached the torque setting
of putting a screw in.
Although the Makita sounds like this from about half way of putting the
screw in, it still continues to drive the screw in with that ratchet sound
but very slowly.
The batteries are fully charged.
Is this normal?

Cheers

Steven.