So, long story short, my N7 ended up sitting in my glove compartment of my car for long enough for the battery to go dead and for the temperature to get below freezing several times. But I retrieved it today and tried to power it on. Nothing happened of course. Dead battery. No problem. I left the thing on the charger all day today at work, got home and pressed the power button. Nothing happened. No matter how long I hold the power down, it doesn't come back to life. Could I have killed it completely by leaving it in the cold?