Inside the iPod nano, 6th generation

The uber-dismantlers at iFixit have in their hands a brand new 6th generation iPod nano - and have ripped it apart!

Highlights from the teardown:

• This iPod Nano's battery only has two wires, one red and one black. All the other iPod Nanos we've taken apart have included three battery wires. That third battery wire typically ties into a thermistor, a resistor whose value changes with temperature (a poor man's thermometer). Presumably the iPod Nano's battery is small enough and the charge rate is slow enough that overheating is not a concern.
• The 1.54", 240 x 240 pixel LCD screen is equipped with multi-touch, although how anyone is supposed to comfortably fit more than one finger on the display is a mystery.
• The Nano has a 220 pixels-per-inch (PPI) screen, the highest pixel density on an Apple device aside from the iPhone 4 / iPod Touch 4th Gen. That's almost double the iPad's paltry 132 PPI density!
• Pure speculation: The front glass on the Nano sticks up about .3 mm from the outer case. Why, you ask? Presumably due to the thickness of the headphone jack. Apple wanted to keep the device as thin as possible, and the curvature of the edges would have forced the case to be thicker for a completely flush glass panel. A thicker case was ditched in favor of the glass sticking out slightly.
• Like its cousins -- the iPhone 4 and the new iPod Touch -- the touchscreen, LCD, and front glass are inseparable.
• The Nano's battery has a capacity of 105 mAh, compared to the Shuffle's 51 mAh. We assume the Nano uses the extra juice to power its display (which the Shuffle lacks).
• The headphone jack, volume buttons, and sleep/wake button are all found on the same ribbon cable that snakes around the inner perimeter of the Nano. Very efficient!

If nothing else, packing all that gear into such a small space is a marvel of engineering.