I bought an iPod mini the day they were revised. I got it Friday and have been playing with it and LOVE IT! There is a problem though. I bought it because it boasted a 18 hour battery life. I ran a test where I ran it on suffle without touching any buttons or anything and it ran out at 9 hours. Could I have gotten one of the old ones by mistake? Should I call Apple? It is the 4GB silver model. Thanks!