Tried that, the phone turns back on immediately.
Not even that, it doesn't actually add any charge. I am convinced that when my phone gets too low, my usb charging fromt he laptop doesn't really do much. All I was doing was playing a little AB, well a lot, but that shouldn't outpace the charge. I also roam when I am at work so I am using the radio a bit harder than normal.
I actually haven't been all that impressed with the overall battery life I have been getting with the Photon relative to my old Evo. When I check what is using the most juice, Display is always the top dog with somewhere north of 60%. For example, I just took my phone off the charger. Been on for 22 minutes, display is at 15% of usage with only 1m24s of time on. This is at low brightness.