It my experient of Samsung Np R538 Laptop.And its was using in till date. This laptop process of data gradually fast and than to catch easily data and store it data.And the power save mode is long lasting, battery without charging can be use three four days.Its is very important in laptop because every time we have no time to charge the laptop.Now a day commonly use in office or any other place( Without current) in this time this Laptop is very comfort to use.I have use 3 model of laptop but this samsung Np- 538 laptop is my best choice of other laptop.