Apple draws on a series of adapters for the wall socket as well as the international adapter kit with seven different sockets (Apple World Travel Adapter Kit). The reason is a potential problem that can manifest itself in the accessory with three prongs that could go to break and that could also go as far as to involve the risk of electric shock if it comes into contact with the metal parts.
How to recognize the affected adapter? As shown in the image (which compares the old with the new model)
If you need a replacement adapter to charge your iPhone, iPad, or iPod, we recommend getting an Apple USB power adapter. For a limited time, you can purchase one Apple USB power adapter at a special price — 839 INR. To qualify, you must turn in at least one USB power adapter and bring your iPhone, iPad, or iPod to an Apple Retail Store or participating Apple Authorized Service Provider for serial number validation. The special pricing on Apple USB power adapters is limited to one adapter for each iPhone, iPad, and iPod you own and is valid until October 18, 2013.
Apple is offering this extraordinary take-back program for any USB control connector made for use with iPhone, iPad, and iPod for which you have concerns. ( News Source- Apple)
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