CORDLESS SCREWDRIVER WALTER GUIDE

Cordless screwdriver vs. drill

There are many different models of cordless screwdrivers, cordless drills, cordless hammer drills and so on, but which is just the right tool for the job? If it’ only small jobs that have to be done around the house like; screwing a chair leg back on or moving a shelf then a small and handy cordless screwdriver, like the WALTER 4-volt cordless screwdriver including bits, is ideal. With its compact dimensions, it can help you get into even the narrowest corners. However, for larger jobs on a regular basis, we recommend one of our top sellers, such as the 20-volt cordless drill driver. With this you can not only screw but also drill holes into walls or other materials. It is much more powerful and capable allowing you to drill or screw consistently and persistently even into harder materials.

• Cordless drill driver: A cordless drill driver is best used for screwing and drilling work in wood or plastic. These tools are perfect for hobby do-it-yourselfers as well as beginners. This "all-rounder" should not be missing from any household as it is capable for both light and heavy use.
• Cordless screwdriver: The cordless screwdriver itself is only suitable for screwing and unscrewing. It is usually more compact and thus helps in particularly narrow corners of the house, as it has less power, itd is generally only really recommended for occasional use. It is ideal for when working with wood and hardened plastics.
• Cordless impact driver: Can be used for screwing into wood, plastic and metal as well as tightening and removing nuts, which can be useful for changing car tires. Thanks to their high-performance characteristics, they are suitable for both do-it-yourselfers and professionals alike.
• Cordless impact drill driver: With both drill and impact driving capabilities, this tool will not only allow you to tighten and undo nuts and coach screws but will also give you the ability to drill holes in a broad range of materials including concrete. Both professionals and DIY user’s will find all their needs covered with this particular piece of kit.

Torque activation function

The torque setting plays an important role for all models. So, what is it exactly? The slipping clutch will engage as soon as the set torque is exceeded which will, when working with timber for example, prevent the screw from penetrating too far into the surface and will also help to avoid bur damage to both the drill bit and the screws head. So in actuality, the more settings that are available, the more precisely this force can be adjusted.

Different battery types

Despite their different technical characteristics, each individual cordless drill or impact driver have one thing in common; the rechargeable battery. Without it, none of these devices would be able to function. Here we will briefly explain the differences between; nickel-metal hydride (NiMH) and lithium-ion (Li-Ion) batteries. The type of battery that is powering your tool will be either written directly on the battery itself or indicated in the technical data.

• Lithium ion battery: Li-Ion batteries are an electrochemical voltage source based on lithium. They have a particularly high energy density and have a much longer service life than other types of batteries. As a result of the latest technologies, these batteries are particularly ideal for portable tools which, a relatively small battery with a high energy density, can operate suitably.
• Nickel-metal hydride battery: The NiMH battery is relatively old technology that is often used in the low-voltage range up to 2.5 volt. However, its connection is very sensitive to overcharging and, in this case, a rapid drop in performance can be detected relatively quickly. They are also sensitive to heat and cold, so that working below zero and above 30°C can be problematic.

Whether it is a built-in or external battery. WALTER batteries comply with all relevant safety standards and undergo ample quality control measures before they are put on sale. Furthermore, WALTER only uses lithium-ion batteries without memory effect, so that they are particularly durable.

à You can find the right battery for your WALTER tool at the onlineshop.

What does Volt or mAh tell us about the battery?

The volt number measures the voltage in the battery and the mAh measures the storage capacity and this together gives the energy in watt hours. Batteries with a high volt number are only necessary when either a high torque or a high speed is required, for example when sawing or drilling.

Much more important than a high volt number is the efficiency of the battery. For example, a battery with less volts may have a higher efficiency than one with more, if the milli ampere hours (mAh) are higher, means more energy can be drawn from the battery.

How is a high-performance battery correctly charged?

The battery is the heart of every cordless tool, so it should be taken special care of, in order to avoid unnecessary expenses!

As a general rule, a lithium-ion battery should never be fully charged or completely discharged. A working window of 20-80% is exactly right. Why is that?

• Why is that? If the battery is too empty or completely discharged, the current flows too quickly into the battery and could cause overheating. This can have several negative effects on the battery such as destroying the cells which can reduce the battery’s long-term capacity.
• If the charge level of the battery is above 80%, then the current must be forced into the battery with a much higher density, so that it can overheat and cause long-term damage to the battery. Overcharging the battery permanently destroys the chemical storage ratio of the battery. For this reason, it is best to orientate the charging time, as indicated in the user’s manual operating instructions.
• Another important detail is the timing. Batteries should only be recharged when their performance noticeably decreases.

In the case of high-quality WALTER batteries however, temperature sensors are built into the batteries, making overheating impossible.

If you do not use the battery for long periods of time then remove it from the device and store it in a dry, cool place. This will prevent the battery from discharging itself. At a room temperature of 22°C the battery discharges itself at a rate of approximately one percent per day.