When it comes to cordless power tools, you usually have to make a choice between two things: power and convenience.  As technology advances, especially battery technology, the gap is beginning to shrink and smaller tools are becoming more powerful.  One of the clear examples of that is Milwaukee Tool’s new M18 Fuel Hackzall, a one-handed reciprocating saw, which was first announced at the manufacturer’s New Product Symposium in June of this year.