Many power tools come with both a power cord attached, and cordless options. Both configurations are useful for various tasks, however there are certain situations where using one option is definitely the best.

Cordless tools are often used when the work is in an awkward or difficult place to reach. The cordless nature of a power tool can allow it to be carried around more easily, as well as be angled in more variable angles to reach areas that would be unassailable with a wired tool.

Cordless tools can usually also be fitted with cord attachments. This is useful when the battery pack starts to run out of power and there is still work to be done.

Wired tools are often used for jobs that are going to take several hours, in which a battery pack on a cordless tool would certainly run out. Many heavy power tools can only be powered with the cord attached, requiring the full power of a mains socket.