I'm getting my iPad 2 in roughly 90 minutes after waiting for 3 1/2 weeks. My question is about the battery. It use to be that you had to charge up the battery of whatever tech that you were using for a full 18 to 24 hours before you used the tech in question. This was required for the battery to hold a full charge. I am, of course talking about the old nickle cadmium batteries. Is it neccesarry to fully charge the iPad like that before I use it or (once I sync it) can I use the machine right out of the box? Thanks.