The guys at iFixit are really crazy. What they did was to remove the battery from the new 17-inch unibody MacBook Pro. For common people that would be unthinkable. You would break it for sure not to mention the guarantee that would be invalid.
But these guys they pretty much pull apart and open everything unsoldered. However, there isn’t any much different with the 15 inch unibody MacBook Pro although the 17-inch has a big battery, even too big. To keep the heat down, the new 17-inch unibody MacBook Pro has a bigger fan and according to the guys it was quite cool.
Apple boasted that the big battery will last for 8 hours and the 17 incher is equipped with a high-resolution wide screen. In contrast with everything, the 17-inch Macbook Pro is very light.
This is what Apple has to say about it:
The longest-lasting Mac notebook battery ever.
The battery in the new 17-inch MacBook Pro lasts up to 8 hours on a single charge1 and can be recharged up to 1000 times2 — compared with only 200 to 300 times for typical notebooks. To do this, Apple engineers custom-designed lithium-polymer cells to create the largest possible battery, then they went even further: They built the battery right into the computer, eliminating the space-consuming mechanisms and housings that standard removable batteries require. The result is a battery that’s 40 percent bigger than the previous generation and offers up to 8 hours of wireless productivity on a single charge — all in a notebook that’s less than an inch thin, weighs just 6.6 pounds,3 and remains the same price as the previous-generation model.