How did this happen?

I bought my e260 just before Christmas, and had no problems with it at all. I have not dropped it, washed it, burnt it, smashed it, or caused it any pain what so ever. Yet, I leave one evening after showing my friend how cool my docking station was (Yes, I went online and got all the updates, I have had it for a while.) and I come home after a couple of hours and find it dead, non responive, and blank (Even the wheel would not light up). I had originaly turned the MP3 off and left it on the docking station, in a rush to get out the door. I can't remember if I left the actual docking statin on or not but, when I got home and wanted to listen to my music, it would not turn on at all, although I know that it was fully charged. I tried holding the menu button for 15-20 seconds and it still didn't turn on at all. I tried looking at the instrutions for some troubleshooting help, but to no avail. I also tried connecting it to my computer to see if that would help, but once again, failure. It gave me a signal that said that the computer could not recognize this USB device because it was malfunctioning, and told me to replace it. I may have exausted the battery from constant charging because I was always listening to it on my docking station at home. I just want to know what I can do to fix it without sending it away or having to replace the battery (if I can).Can you help please?!