A cordless screwdriver uses its battery to make its head turn. You insert the bits into the head, or so-called chuck, which comes in all sorts of shapes to fit a wide variety of screws. With the help of these rotating attachments, also known as bits, you then ensure that the screws are screwed into the material quickly and easily - without any effort on your part.

There are several types of cordless screwdrivers, which bring different functions and tasks. They can be roughly summarized into the following categories: 

• Cordless Screwdriver -Variants: Cordless bend screwdriver, mini cordless screwdriver, cordless impact screwdriver, cordless ratchet screwdriver.
• Cordless drill screwdriver - Variants: cordless impact drill, cordless angle drill.
• Cordless hammer drill - Variants: Cordless combi hammer.

As the name suggests, you also use drill screwdrivers for drilling. Hammer drills are intended for use on particularly hard materials and thick concrete walls.

Your cordless screwdriver should be able to provide enough power, which you can see from the volt number, the torque and the speed. Another important specification is the power of the battery in ampere hours (Ah), as this shows you how long you will use the screwdriver. In addition, a clockwise and anticlockwise rotation is a useful function, as you can also unscrew screws effortlessly.

Modern cordless screwdrivers have several functions and features that make your work easier in many ways. For example, integrated LEDs ensure easy screwing in the dark, a soft grip offers you a better and more ergonomic hold of the screwdriver and an overload protection prevents a malfunction of your battery. 

When it comes to choosing features for your cordless screwdriver, ask yourself which ones you really need and which ones you don't want to pay extra for. LEDs, for example, are useful if you often work in the dark, but they can also be replaced by a lamp, and why not a headlamp. You'll automatically notice the soft grip every time you screw. You shouldn't skimp on safety features like overload protection.

Your cordless screwdriver should have a maximum of 18 volts. The reason for this is that a higher volt number brings more power, but also more weight.

This depends on the power of your battery and your use of it. You can tell how powerful the battery is by the number of amp-hours, with two amp-hours giving you about two hours of screwing. But aspects such as the type of battery, proper charging, the age of the battery, and the ambient temperature all affect the power of your battery. A tip for do-it-yourselfers is to always have a second battery available, as you will charge it while using the other battery.