The last 2 laptops that I've bought (both HP) run noticeably cooler then previous laptops that I've owned (Toshiba and Dell). In fact I feel no heat on my legs at all from either of them. Did some new technology come along in the last few years that allows the batteries to produce less heat or allow the machine to use less current? Or is HP just better about temperature management then other manufacturers? Is this a difference between manufacturers or a difference between newer and older technology? In either case, what IS the difference?