ASUS U31 Series brings power in a thin and light design Powered by a Super Hybrid Engine-boosted standard voltage Intel® Core™ i3 or i5 processor Super Hybrid Engine extends battery life to 10 hours* for all-day, on-the-go computing Elegant design that comes in under an inch thick for maximum portability*Mobile Mark 2007 reader mode @ Super Hybrid Engine Battery Saving mode with 8cell 5600mAh battery , WLAN/BT turn off. Shop Modal header ASUS Super Hybrid Engine boosts performance up to 15 percent With its supercharged performance, the ASUS Super Hybrid Engine boosts the U31JG notebook performance up to 15 percent in demanding tasks, thanks to its dynamic overclocking technology. It's not simply about cranking up the CPU though, ASUS engineers have specifically tuned several system-wide values to optimise the performance gains for the energy used, and Super Hybrid Engine is designed to work specifically on Intel® Core™ i3, i5 mobility processors! The Super Hybrid Engine boosts performance only when required by CPU-intensive tasks, like games and high definition movies, without sacrificing any stability and reliability.*Product performance will vary depending on usage and model. Battery Boost means you don't compromise on all-day computing As an urban professional constantly on the move, having a notebook that can keep up with you is of absolute importance. That’s why the U31 features not one, but two energy-optimizing technologies that work together to ensure that the notebook stays running for an incredible 10 hours! Super Hybrid Engine's 'Battery Saving' mode intelligently reduce power consumption based on usage, while NVIDIA® Optimus™ technology auto-switches between the dedicated GeForce GT415M and integrated GPU to suit the intensity of the graphics being rendered—making sure that not an ounce of energy is wasted and the U31JG remains cooler to use! *Mobile Mark 2007 reader mode @ Super Hybrid Engine Battery Saving mode with 8cell 5600mAh battery , WLAN/BT turn off. Super slim, ultra portable, incredibly beautiful Combined with its extremely slim and beautiful sub 1-inch thin design, the U31 series notebooks can be easily slipped into any backpack or briefcase. Combining this attractive form factor with the technical advancements of the Super Hybrid Engine for extra performance and boosted battery life, it raises the bar even further creating the most powerful ultra-portable in the world.