The selection of the battery cannot be neglected be of a purchase decision for a Cordless screwdriver. The Cordless screwdriver as one of the dearest friends of the common artisan acquires a lot, without thereby requiring human effort. An electric motor that is powered via the charged battery can be also in hard materials such as stone and iron slide screws. The battery as such and as a craftsman drive must be selected carefully so already at the time of purchase. An evaluation criterion in the selection of batteries represents the load property of the corresponding part.
Older NiMH batteries must be charged according to the usual rule, which must not be recharged, before is not fully discharged. Lithium-ion batteries, however, can be recharged at any time and regardless of how far the battery at this time is charged. When using older NiMH batteries therefore the alternate use of two batteries is advisable, to get ahead quickly. The capacity, another important selection criterion in the decision-making process, in Amp-hours on each battery noted. This is not to ignore that also its weight increases with the increasing capacity of a battery and a heavy battery is more complicated works much less well in hand. The torque in NM (Newton meter) is another battery attribute (selection of the battery), which should be taken into account. While small Handakkuschrauber have a low, for example, 3 nm of torque, this increases the required a work force. The force still has a push button can be precisely regulated.
In addition, there is the opportunity to work in different courses. The quick stop feature also allows for an instant braking when you let go of the push button. Because too little power to heavy work can lead to overheating of the motor, generally rather too much than too little is nm. A built-in LED lamp illuminates the screw to be processed accurately and because in the operation of that time can be lost wrenches, to the bend forward Keyless chuck keyless recommended. In addition, an automatic spindle lock facilitates clamping a new bits.