The SU7300 series chips will suffice
the msi ones come with 8 cell batterys
http://www.newegg.com/Product/Product.aspx?Item=N82E16834152236&nm_mc=OTC-Froogle&cm_mmc=OTC-Froogle-_-Notebooks-_-MSI-_-34152236
turn the settings low and you get just about 7 hrs of life.
