It used to be that vacuum cleaners had one suction setting, plus perhaps a Boost mode that you activated manually when you needed to clear really tricky, ingrained dirt. Nowadays, it's increasingly common to see an 'auto' mode, where the vacuum itself decides exactly how much suction is required for any given area, and adjusts accordingly.
As the author of TechRadar's best cordless vacuums guide, I've tested numerous options – from models with no automation to speak of right up to vacuums that can detect a whole range of different environmental factors. So is automatic suction adjustment worth it? Here's my take...
