Alternately, people realize practical conveniences from the cordless impact hammer for using: First of all, cordless design brings operators unprecedented mobility. They can work in narrow space and space that is hard to reach without constraint of a power cord; Second, compact and lightweight construction mean that the tool fattigue after long periods of use does not become a major issue - how nice! In fact, rather than tiring you out faster on the job (as heavier machines do), its light weight lighter weight allows for more work The end result: both increased efficiency and longer hours in which things can get done. Thirdly, high-impact capability means the hammer can chew through demanding work such as taking out rusted nut bolts and drilling lag screws into tough materials. Another benefit is the consistent output in battery power management provided by our integrated battery system. What's more, when you've exhausted one set of batteries another set charges up totally free of charge from just natural light -- that means better than any dirty power sources!