Won't charge after battery replacement.

I was gifted just the ipod with no accessories. I found a cable to charge it with and succeeded to put a small charge on it, just enough to listen to some music and make sure everything worked.

I replaced the battery yesterday, and ended up running the ipod dead listening to it for a while. Now I can't get it to charge. It charged enough to turn on, but if I unplug it the battery icon is a thin sliver and it will shut itself off shortly afterwards.

I did notice that the battery fitment wasn't great, but I managed to get everything installed. I don't have an apple charger anymore, let alone a firewire one. Any help or insight is appreciated.