For the record label, see Cordless Recordings
The term cordless is generally used to refer to electrical or electronic devices that are powered by a battery or battery pack and can operate without a power cord or cable attached to an electrical outlet to provide mains power, allowing greater mobility.[1] The term "cordless" should not be confused with the term "wireless", although it often is in common usage, possibly because some cordless devices (e.g., cordless telephones) are also wireless. The term "wireless" generally refers to devices that use some form of energy (e.g., radio waves, infrared, ultrasonic, etc.) to transfer information or commands over a distance without the use of communication wires, regardless of whether the device gets its power from a power cord or a battery. The term "portable" is an even more general term and, when referring to electrical and electronic devices, usually means devices which are totally self-contained (e.g., have built-in power supplies, have no base unit, etc.) and which may also use wireless technology.
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There are three types of drills: hand-held drills (with cord or cordless), drill presses and magnetic base drills. You must take your working conditions into consideration in order to choose the most suitable type of drill.
First of all, depending on the materials you have to drill, the diameter and depth of the holes will not be the same. Most manufacturers will provide you with information on the maximum diameters and depths for each material.
The power of the drill is another characteristic you must consider. The more powerful your drill is, the easier it will be to drill through very hard materials, such as concrete.
The speed depends on the power of the drill. For some materials (such as metals), if the speed is too high, you will damage the drill bit. We therefore recommend that you use a drill with electronic speed control for this type of material.
Lastly, in the case of a portable cordless drill, it is important to pay attention to the device voltage. The higher the battery voltage, the more powerful it will be.