Our top of the range model the SW22, is the UK&8217;s first lithium-ion sweeper, with a massive 2 hour runtime. SW02 Cordless Electronic Sweeper has all the same features as our premium SW20 model, with two key differences: 1. Lithium-ion battery technology, delivering a massive 2 hour runtime 2. Super-fast charge. The SW22 is ready to clean your home in just 30 minutes & fully charges in just three hours.