I'm debating if I should exchange my i5 for the i7 SP3. I already know that the i7 version does not throttle as low as the i5 version and can maintain a stable 2.29GHz and 75C temperature, whereas, my i5 throttles down to 1.5GHz and 65C temp. But what I don't know is the battery life. I can get around 6.5-7hrs on battery with the i5 version. If the i7 battery life is significantly less, than I probably won't upgrade. Can people post their battery life please? Thanks.