Unsurprisingly, iFixit is close behind with a detailed teardown of the diminutive music player. It took a half hour of prying and heat application to open the device's case, but they were finally able to gain access to its internals. Among the interesting items of note:

• The new hardware carries a model number of A1373, updated from the A1271 designation of the previous generation hardware.
• The fourth-generation hardware has a height of 1.14 inches, width of 1.24 inches, depth of 0.34 inches, and weight of 0.44 ounces.
• The control ribbon cable is just 1/8 of an inch wide, and the logic board is held in place by just one screw. The battery is soldered to the logic board.
• The 3.7V lithium-ion battery has a listed capacity of .19 Whr, which is good for 15 hours of audio playback.
• The manufacture dates on the die indicate the hardware was built in late June and early August of 2010.