Hi friends, I purchase this laptop before two months till now battery backup is good and another important thing is it is suitable for windows 8.1 when compare to other operating system because it has 4Gb Ram and 1Tb Harddisk and Graphics card Ram size 2Gb and it has 2.2Ghz processor speed and processor type core i5-5200U. I use three operating system in this laptop i.e., (windows 7, 8, 10) it is suitable for Windows 8.1 it has good processing speed as well as high defintion display. Till now I don’t found any type of problem with this Laptop.