Hello there , i bought a new Asus vivobook s551 about 2 weeks ago , i used to get about 4-6 hours of batter life on a single charge on the power saving mode while web browsing/facebook . about two days ago , i started getting a " your current brightness settings might reduce battery life" message even though the brightness is set to less than 50% and the battery just went from 100 to 86 % in about half an hour . idk why it's losing its charge so fast or why I'm getting this message . any help would be appreciated