CNET tests hundreds of cordless vacuums on different flooring types and debris types. Getty Images/Amy Kim/CNET We test all sizes and shapes of vacuums here at CNET. From lightweight cordless alternatives to increasingly advanced robot vacuums , we’ve put hundreds of models across every category through their paces. Our cordless vacuum testing takes place at the CNET test lab in Louisville, Kentucky. Each cordless vacuum goes through a gamut of tests across different flooring types, along with evaluations of features, battery life and overall usability. Here’s how we do it. How we test cordless vacuum cleaners at CNET All the vacuums on CNET’s best lists are tested and evaluated in our state-of-the-art test labs. CNET Testing Labs go beyond product specifications to test in real-world conditions with real-life messes. Over the years, our experts have tested 50 cordless vacuums and counting. Here’s a breakdown of how we measure cordless stick vacuum performance .…