I bought Lenovo G50 70 Laptop from Amazon. it is a nice laptop its graphics is not so good. as it is written Amazon, Flipkart etc that it give you 5 hours battery backup but it give only 2:30 to 3 hours backup overall it is a nice laptop no heating problem. it has 4 GB ram and you can expand it to 16 GB.
You can use it for all day and night that is the plus point and drivers software could have been better and best is customer care, very good customer care they really care about their customers and they definitely solve your problem.