DC34 delivers 15 minutes of powerful, constant suction, or 6 minutes on MAX power for tougher cleans. It's powered by the Dyson digital motor, which spins up to 5 times faster than a racing car engine. It has a lithium-ion battery that recharges up to 3 times faster than others, and Dyson's patented Root Cyclone technology for no loss of suction. Dyson's patented Root Cyclone technology doesn't rely on a bag. Instead, it spins the air so fast that centrifugal forces up to 100,000 times the force of gravity fling dust and dirt out of the air and straight into the clear bin. And that includes the fine dust that can restrict airflow in some ordinary bagless vacuums. Unlike some other vacuum cleaners, Dyson machines don't lose suction.