I am about 99% sure the answer is no, but on the off chance that I am wrong, I thought I would ask.
If I am running one of my Edisons on a Hexapod, using Lipo battery (3S), and I detect that lipo is dropping below some threshold voltage. I would like to shut things off as much as possible, as to not kill yet another lipo battery. Killed one two days ago, when I thought I had turned it off, but obviously I had not.
With the PhantomX, I can currently (and should) do some things to help reduce this, like when the voltage gets too low, I can tell the AX servos to turn their motors off. Their processors, will probably still use a little power. I can also do things like issue a system command of: shutdown now.
The shutdown appears to remove power from the USB buss, so the USB2AX that I have connected as well as the sound card, get un-powered.
However the shields show now signs of losing power. The XBee shield is still blinking LEDS - I can probably minimize some of this by probably issuing some command to the xbee to power down or at least go to sleep. Also could instead go to XBee connected by USB, which I will do when using mini-breakout.
Some of the time I have an Adafruit TFT display on it, who eats some power, especially the back light. I might be able to reduce some of this, by setting up a jumper on the display, to have the backlight controlled by IO pin... Possibly with PWM to control brightness. Hopefully when no power on Edison hopefully the backlight will be off...
Again I think I already know the answer (NO). But maybe I will get surprised.
Thanks