What dose the white battery and the black plug mean on itouch?

[xtragicx]

http://yfrog.com/b7picturelcp it dosen't want to charge when that's there.
well i mean for some reason the last few days it goes completely dead and i have to restore it for it to even charge a little..if i don't it shows a red charging bar with a lightning bolt.

 

[Shawn]

it could mean your battery is dead