Burning the midnight oil, of the new iPad. What did iFixit find after bending over backward to remove the glued-in glass panel? A massive battery.

The new iPad boasts a 42.5 watt-hour battery, much bigger than the iPad 2's 25 watt-hour battery, which is why the new iPad is slightly heavier than the iPad 2 (1.44 pounds compared to 1.33 pounds) and thicker (.37 inches compared to .34 inches).

The new iPad and iPad 2 have comparable battery lives, 10 hours of use. So the extra juice of the new iPad will be used to power the new dual-core AX5 processor and integrated quad-core graphics.

Apple unveiled the , showcasing a high-resolution display that doubles the number of pixels in the iPad 2 and even surpassing HDTV. Screen display, of course, eats up battery life. The bigger battery capacity must accommodate the new iPad's 2048-by-1536 pixels resolution.

Here is a list of the new iPad's specs, courtesy of iFixit: