Why doesnt my iPod turn on?

My friend gave me his ipod to add music, so first the screen froze and he fixed it but he told me to drain the battery so it if can work properly when i charged it so now. I just got home and charged it from an outlet for 30 minutes at the beginning of the charging it had the symbol that the battery is dead. Then i left it alone thinking it was charging but then when i came to check it and it didnt even turn on at all. I held on to the lock and even the home button but still nothing and now im trying to connect it to the computer but nothing, it doesn't even sense the device. helpp!!