Answer to: How can I tell if my derailleur hanger is bent?The hanger should be parallel with the the face of the rear cogs. With the derailleur installed, the pulleys should be in the same plane as the rear cogs.
Answer to: Battery Only Charges In Car.It sounds as though you have a bad battery. I have noticed that my iPod and iPhone do charge more quickly when plugged into the car. It seems as though you are able to give the battery a quick boost but the capacity is depleted. If the guy you bought it from is unwilling to repair it or you don't want to go through the hassel of dealing with him, you may want to tak eth opportunity to pickup a battery kit from here and try the repair yourself.
Answer to: Is it possible to fix an ipod after its been in water?You can try placing the moist parts in a resealable bag with some uncooked rice. The rice will act as a desiccant and pull the moisture from hard to reach places.