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Is the lack of air flow a good or bad thing? Are the new iPad going to make good hand warmers? Cheers. Steve. On Fri, 2012-03-16 at 10:17 -0400, Richard Pieri wrote: > iFixit got their hands on one of the first The New iPads (by Ghu that's > an unwieldly name) yesterday and proceeded to take it apart. This is > relevant to the recent discussion about tablets and power consumption. > For comparison, I have here an HP Pavilion dm1-4010us notebook with > 11.6" 1336x768 screen and Fusion E-450 APU clocked at 1.65GHz. The > battery pack on it is rated at 55 Watt-hours and HP rates the whole kit > as running "up to 9.5 hours" on battery power. > > iPad 2 has 25 Watt-hours of battery packs inside the case and is rated > at 9-10 hours run time. The The New iPad (by Ghu that's *still* an > unwieldly name) has 42.5 Watt-hours of battery packs inside delivering > the same 9-10 hours run time. Nobody's publicly posted the TDP numbers > yet but you can figure it's rather higher than iPad 2's based on the > power consumption. > > It was suggested that these devices could ramp up their bus and CPU > clocks when on mains power. It's not "just" ramping up the clocks. You > need to cool it. Even fanless Atom netbooks have open space for > convection cooling. There is no space inside iPads for airflow. The > metal case back is how iPads dissipate heat. Apple doesn't even use > screws because they take up too much space. It's all glued together. > > That's the design philosophy for these things. Doesn't matter who makes > them, be it Apple or Motorola or Barnes & Noble or whoever. More > battery equals more run time equals better product. They're not going > to "waste" space for airflow when that space could be used for more battery. >
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