I just deleted your other post as it was a duplicate of this one. Please do not do this since it makes it hard for other members to read and help you if there are multiple threads of the same topic present. It is also against forum rules.
Thanks,
Ski ~ iPadforums Moderator | iPhoneForums Moderator
You should definitely get a new one, Apple does not put unnecessary parts in its iPhones. I believe it's a grounding clip for the battery. You should be able to buy the part from a site such as iFixit.