In contrast, the Slingbox 500 is not a box, but rather, some amorphous shape we're pretty sure we never covered in high school geometry.

ENGADGET: Slingbox 350 and 500 review: Sling Media finally upgrades its line of media streamers

Many batteries are made in a kind of "Swiss roll" geometry, in which the layers are rolled up into a cylindrical or round-edged rectangular shape.

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