The suction power of a cordless vacuum is produced via a battery, w hile corded vacuums are required to be plugged into an electric outlet which gener ates consistent suction power. However, Dyson cord-free vacuums can perform just a s efficiently with its Dyson Hyperdymium motor, that spins at up to 125,000rpm to generate powerful Dyson Suction - it's powerful and lightweight.1