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Lies, Damn Lies, and Battery-Life Statistics
theodp writes "What if automakers measured gas mileage by rolling their cars downhill with their engines idling? They might, Newsweek's Daniel Lyons suggests, if they took inspiration from the MobileMark 2007 notebook battery-life benchmark test, the creation of a consortium called BAPCo, whose members are — surprise — computer makers and other tech companies. Laptops score big numbers, Lyons explains, because they're tested with screens dimmed to 20%-30% of full brightness, Wi-Fi turned off, and the main processor chip running at 7.5% of capacity. Professional reviewers see company-generated battery-life claims as a joke. 'The rule of thumb is that in real-world use you get about 50 percent of rated battery life,' says a Gizmodo associate editor. Leading the call for reform is the not-necessarily-altruistic AMD, who gripes that MM07 was created in Intel's labs and rigged so Intel chips would outscore AMD chips, which draw more power when idle."
You don't seriously expect that the internal battery is any more "apple manufactured" than the removable battery was, do you?
Apple, like pretty much all the domestic PC brands, has little to no manufacturing capacity in-house. Possibly some prototyping, and likely some customization/assembly; but all the serious manufacturing is handled by a bunch of OEMs and their suppliers. The cells will be sourced from some third party in any case.