iPod Nano - completely dead?

I was listening to my iPod whilst walking the other day, when suddenly it stopped. I took it out of my pocket to see why, and a message on the screen told me to plug it in and charge it whenever I pressed a button. This was odd as I had just charged it that morning and when I had last looked at it - less than 10 minutes ago - it was on roughly 75% charge.

So I kept walking to my friend's house and when I got there, I put it on charge on his dock. I come back roughly two hours later, and my iPod is completely dead. Nothing happens when I press any buttons, I can't do anything with it at all.

I figured it must just have been an incompatibility issue between his dock and my iPod(causing it to not charge), but when I got home later that night and plugged it into my Mac to charge, nothing happened at all. No lights, no screen, nothing. After leaving it plugged into my computer for a few hours, there was still no sign of any life on either the iPod screen or in iTunes. My computer wasn't seeing anything of my iPod.

Since then, the only advice I can find about it is to try the 5 R's, but none of them work unless the iPod is actually responding to anything.

Whatever's happened to my iPod has really screwed it over, and I can't find any other reference to it anywhere on the discussions. I won it in a competition, and I do not believe it has any warranty.

I'd really appreciate it if you could tell me what the problem is, and if there is anything I can do to fix it.

-Perth, Western Australia-