4th generation ipod (hp version, non-photo) so, i know these things have shitty battery life... my girlfriend asked me to change her battery and ordered a replacement for the 4th generation ipod (hers). it got here, i changed the battery, charged it, and it's having the same problem as before it'll say it's charging and then eventually claim it's charged (through the wall power), but when i try to turn it on, it almost immediately says that there's no battery power left (just like it was doing before the battery swap). anyone had this problem before? ideas? could it just be a bad new battery? or does anyone think it could be an ipod motherboard problem?