To the device, I needed a cordless screwdriver which the "rod" is transformed to, screws in corners. He also sollter be small and strong. I have found in this device. An LED light the lamp on the screw, and a holster in which the cordless screwdriver attach to a belt is possible as a pistol and also has room for bits provides complete the picture.
The force that the little dwarf is generated when screws high enough to small screws to screw up to 2.5 x 25 mm in pine or the like. Or an IKEA furniture zusammenzuschrauben. In order to screw screws in hardwood every second you need a different device. I use it mainly to the screws from motherboard out and hineinzuschrauben again, this provides the cordless screwdriver for a much needed 7 stage torque preselection. In order to loosen the screws I the corners of the PC just the "stick" function.
I have found (and this seems to be a property of LiIon batteries) that the device is best run dry to 70% (this corresponds to me about 1 hour screws with breaks) and is then fully charged, otherwise the works suddenly stop device. I do not know if that is designed to protect the battery from damage, but I do it so now and you also wonder if you do not the cordless screwdriver suddenly no longer goes :-) so. The LED is on, but the screwdriver screwed no longer :-) full loading is then mandatory, then it funzt again.
Personal conclusion: electric screwdriver good for small objects, SERVICE OF EINHELL PERFECT !!!