What is a common advantage of using a brushless motor in a battery-powered trimmer?

• A. It requires more gasoline
• B. It increases cord length
• C. It reduces battery life
• D. Higher efficiency and reduced maintenance

Answer: (D)

Using a brushless motor in a battery-powered trimmer provides higher efficiency and reduced maintenance. Without carbon brushes or a worn commutator, there’s less friction, wear, and carbon dust, so the motor lasts longer and needs less routine servicing. The electronic controller switches windings precisely, cutting energy losses and producing less heat, which means more of the battery’s energy goes into cutting action and you get longer run time per charge. This combination also reduces maintenance needs because there are fewer wear-prone parts to replace. Gasoline-powered tools aren’t relevant here, cord length doesn’t affect a cordless model, and a brushless design tends to improve, not decrease, battery life.