Power vs. Heat and Battery Life Based on limited reviews from LaptopMag of the 2.3GHz 15'' Macbook Pro, we can see with the 15'' w/2.3GHz processor, the 15-inch MacBook Pro lasted 8 hours and 57 minutes in the LAPTOP Battery Test. Though the 2.6GHz does provide more power... history has shown from the Macbook Air, an i5 to i7 upgrade (despite low clock speed difference) though at idle, may only have a 15 minutes difference in battery life, under heavy loads the battery life goes down close to an hour and the thermals of course become much hotter. Given this fact, the 2.6GHz under load most likely will shave off almost an hour of battery life leaving with maybe just 8 hours or less. Thermals would probably also increase up to the high 90s underside near the hinge and the bottom center area could go up to the low 90s. So if the 2.3GHz and 2.6GHz processor were equivalent in price and cost was not an issue, what processor would you pick?