Dust collection system for power tool

A dust collection system for a power tool, the system comprising:

• a power tool including
• an alternating current motor drivable with a switch, and
• a tool-body power path extending from utility power to the alternating current motor;
• and
• a dust collection attachment attachable to the power tool to collect dust produced by the power tool in use, the dust collection attachment including
• a suction portion,
• a dust collector configured to capture dust sucked through the suction portion,
• a fan configured to generate a suction force in the suction portion,
• a direct current motor configured to rotate the fan,
• a battery pack configured to supply power to the direct current motor, and
• a dust-collector power path extending from the battery pack to the direct current motor, the dust-collector power path being electrically separate from the tool-body power path with the dust collection attachment attached to the power tool,
• the power tool including a responsive unit configured to drive the direct current motor in response to an operation on the switch with the responsive unit electrically separate from a signal path of the switch.