My IPT has a 3.7V lithium-ion polymer battery with a red, a white and a black wire soldered to it. What is the 3rd wire for? When measured there are 3.5V between both red-white and red-black but 0.0V between white-black.
12.PB. (Rev A). &15" MBP. iPod Touch., Mac OS X (10.4.11)