A:AnswerI believe you're looking for an "Apple Power Adapter Extension Cable". They are available separately. If that is all you need, it is much less expensive than buying the entire power adapter. They are a little harder to find than the entire power adapter, but not impossible to find.
A:AnswerFrom my understanding, with any Apple product, there is always a one-year warranty. Just take it to any Apple store within one year of its purchase date and they can assist you with any problems you're having with the charger.