On the official apple website it says that all Macbook pro batteries last for 7 hours, and 8 hours on the 17" macbook pro. However when I called my local apple retailer and asked him, he said the battery has a 'stand by' time of 7 hours, but if I were doing something like using an IDE to program and not watching videos, etc it could last upto 5-6 hours.
When I asked him about why the official site says 7 hours, he said yes but he didn't want to lie to me, and actually the battery only lasts 5-6 hours.
Does anyone who owns a macbook pro shed any light on this, such as how long the battery will actually last? I'll be buying a 15" macbook pro.