iPad 2 stupid battery, how did Apple make the iPad 2 smaller than the first iteration?

So how did Apple make the iPad 2 smaller than the first iteration? It's the battery, stupid.Or, put another way - the size of it. In a followup to its previous teardown analysis of the iPad 2, IHS iSuppli said Wednesday that Apple had decreased the size of the iPad's battery inspiron 1440 battery while increasing the battery's energy density, thus making it smaller while maintaining the same battery life.

iSuppli identified four components that decreased in size from the iPad 1 to the iPad 2: the battery, the clearance between components and the chassis, the thickness of the display, and the touchscreen overlay. In total, the thickness of the iPad 2 decreased by 34 percent to 8.80 millimeters, versus 13.40 millimeters for the iPad 1.

The reduced thickness might not be immediately apparent; as PCMag.com's review of the iPad 2 inspiron 2200 battery inspiron e1505 battery noted, the real physical change is in the contour—the iPad 2 has rounded, narrow edges whereas the original tablet was a bit boxier with wider side panels. The iPad 2 weighs about 600 grams, down 15 percent from 700 grams for the iPad 1, iSuppli said.

"Leveraging its unparalleled design capabilities, Apple Inc. has upped the competitive ante on tablet form factors by substantially decreasing the thickness and weight of the iPad 2," said Kevin Keller, principal analyst for the IHS iSuppli teardown analysis service, in a statement. "Apple has particularly focused on thickness as a point of differentiation for the iPad 2. Other new tablets coming to market, all of which are about as thick as the iPad 1, now look fat in comparison to the iPad 2. This is likely to cause a scramble as competitors rush to slim down to match Apple."

Apple iPad Coverage

Apple's slimmed-down battery is 10 to 15 percent more power efficient, in terms of power delivery versus the mass of the battery. "The iPad 2 battery design represents a major shift from the iPad 1," Keller said. "Apple moved from two thicker cells to three thinner ones, flattening out the entire battery structure. The new design also allowed Apple to eliminate an injection-molded plastic support frame from the battery inspiron 1720 battery inspiron 6400 battery subsystem, further cutting down its thickness."

iSuppli also noted that Apple eliminated the stamped metal sheet frame and adopted a new glass layer for the touchscreen.

"The concurrent release of the iPad 2 and the new Dragontrail Glass technology from Asahi Glass Co. of Japan has led to speculation that Asahi may be the supplier of this durable new glass," Keller said.
Physical tests conducted by IHS reveal that the iPad 2 glass is more flexible than the glass used in the iPad 1, a characteristic of increased durability, Keller said.

UBM and iSuppli also performed teardowns of the iPad 2 inspiron mini 9 battery over the weekend. UBM estimated that the iPad 2—the 32-gigabyte version with 3G—costs approximately $270 to build. That's all of $18 less than the company's estimate of the cost of building a single Motorola Xoom, same storage size. If accurate, then Apple is churning a profit of, at most, $459 for each 32GB device, minus any extra costs (marketing, labor, distribution, etc.) built into the price of the device. That figure also doesn't account for any differences that might show up in the AT&T version of the iPad 2 versus the Verizon version, or vice versa.

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