The compatible RAM for this computer is DDR3L MHz SDRAM and can be found at this page http://www.crucial.com/usa/en/compatible-upgrade-for/ASUS/rog-g751jy. The maximum supported capacity for this computer is 32gb of RAM

There are a number of ways to extend battery life in a laptop. Perhaps the most common method is to type in "battery settings" in the Windows search bar to open up the "Power Options" interface, and then adjust your computers power profile to one of the presets depending on your needs. If you would like to further adjust how your computer manages its power you can go into "Edit Plan Settings" then click on "Advanced Power Settings" and fine tune these settings. Note: If you are unsure what advanced options you wish you change it is highly recommended to just use the default settings.