April 1, 2006 16:17
I have many times run my various Pwr Books from an iGo adapter off a house bank that is running at <11volts. While the computer battery will obviously not charge, the power supply still operates. Don't know what the threshold is on the lo side for the iGo, and I don't really wanna find out ;>), but I would think that it would be as much a current limitation as anything, remember, as the voltage drops, the current the iGo is pulling will increase and at some point some protective device will go.