iPod dead face/caution sign

So I left my iPod on for 5 hours to day with the speakers on full blast. Needless to say it died. Now I tried to connect it but it gives me a "x_x" face on the iPod with a caution sign next to it. Under the "dead" ipod it says: "www.apple.com/support/ipod". Then you hear clicking sounds and it suddenly changes into an empty battery sign with "Please Wait, Very low battery" and a spinning thing at the bottom. After a while it'll reboot and give the dead ipod sign again. Help me T_T;.