today i went with my brother to bestbuy to buy a cheap windows laptop for him. we decided on one and the sales guy told me to get the 2 year replacement warranty because all laptop batteris are GUARANTEED to die out in 7-9 months. was he lying just so that i would buy the extra warranty??? and if he wasnt lying, is it the same with mac laptops??? i plan on buying the first mactel powerbook that comes out in about a year and i didnt plan on buying a new battery every 7-9 months. thanks