When I was searching for a laptop or netbook which can have battery backup of atleast 8 hrs I came to know this product and immediately placed order. The vendor said it shows 15hrs backup but can give upto 10 to 12 hrs. I am charging it at night and using it all the day. I am using dual boot with windows 7 and ubuntu 11.9. At its configuration it is giving optimum performance. In fact this product is no more available in local market ( AP) I bought it at 13,200 but no chance of getting it with local dealers. This is a very useful product if you stay connected all day just browsing and checking. I am also using it for heavy duty applications like Tabbles and Copernic Desktop Search with a little bit slowing down but it is ok for a 1GB RAM.