Good cordless screwdriver

For a professional craftsman of small cordless screwdriver is not recommended, since the torque is not too high in order to bring all the screws in any material.
Tighten properly screws can not be too, but you can also use the good old screwdriver.

For some small bets in the household of "Small" is sufficient absolutely. The battery lasts its time.
It comes with the screwdriver in almost every corner and can thus also drill in tight spaces yet.

My Conclusion:

Not for professional home improvement, but for smaller household chores highly recommended.