Normally, there are two ways of managing heat in a mobile computer. First, heat generation can be reduced by lowering the clock speed; in other words, by reducing performance. Another method maintains performance by using a large fan to dissipate the heat. This method adds additional weight and the power drain of the fan. Panasonic uses Dynamic Power Performance Management (DPPM) Technology programming to control heat output and, in the Hybrid Cooling System, a compact lightweight fan to physically dissipate heat. Rather than a large fan, a compact unit with low power consumption provides adequate cooling. Now you can maintain high performance and enjoy lightweight and extended battery power.