Co-worker just bought a used iphone from someone locally and wants to sync with his itunes on his PC. The iphone came with a bunch of apps installed, etc. If he syncs to his PC, will he lose those apps? If so, is there a way he can back them up before syncing? Or is that a "piracy" issue? Lastly - the battery doesn't seem to last through the day.. What is his best option for getting the battery replaced? Apple? Anyone know what it generally costs?