that's what's so great about the worx gt 2.0. the spools are perfectly pre-wound. >> so you just pop one in, get right back to work. >> plus, worx provides the spools free of charge. whenever you need more, just call the number right on the tool. >> announcer: ordinary line is round and dull and can fray the edges of your grass as it trims. but the worx gt 2.0 uses a revolutionary, new double-helix line for a sharper better-looking cut. >> people who own the worx gt 2.0 love the fact that the lithium battery holds its charge for months. >> so it always starts up in an instant at full power. >> that's right. when you're ready, it's ready. >> the worx gt 2.0 comes standard with its most powerful battery yet -- the next-generation lithium battery with almost twice the capacity. >> which means you get more power and more run-time than ever. >> announcer: and we're going to prove it. we challenged a leading battery-powered trimmer to test against the worx gt 2.0 to see who had more available battery capacity on a single charge. both ma