Stihl HSA 65 hedge trimmer

The $500 Stihl HSA 65 36-volt lithium-ion hedge trimmer won a spot on the Breakthrough Awards list because, the editors said, it "is poised to convert those homeowners demanding a pro-level cut from electric models. A single charge provided more than enough power to completely trim and shape a good-size yard during our tests, while emitting far less pollution than its two-stroke, gas-powered predecessors."