Transmits 1.5 times more power than DC35 and DC44. Customized to provide fade-free power. And the DC59 turns on when you need it, off when you don't. Many other cordless vacuum cleaners remain switched on from the moment cleaning starts. Battery power is wasted between cleaning tasks. Dyson Digital Slim™ vacuum cleaners have a run-time enhancing trigger. Trigger grip releases instantly, meaning battery power is only used for cleaning. It allows for a 26 minute cleaning session.