A few days ago Apple released a statement with regards to their Apple iPhone and Mac chargers.
Apple has determined that, in very rare cases, the two prong Apple AC wall plug adapters designed for use in Continental Europe, Australia, New Zealand, Korea, Argentina and Brazil may break and create a risk of electrical shock if touched. These wall plug adapters shipped from 2003 to 2015 with Mac and certain iOS devices, and were also included in the Apple World Travel Adapter Kit.
Customer safety is always Apple’s top priority, and we have voluntarily decided to exchange affected wall plug adapters with a new, redesigned adapter, free of charge. We encourage customers to exchange any affected parts using the process below.
Note: Other wall plug adapters, including those designed for Canada, China, Hong Kong, Japan, United Kingdom, and United States and Apple USB power adapters are not affected by this program.
Identifying your wall plug adapter
Compare your adapter to the images below. An affected wall plug adapter has 4 or 5 characters or no characters on the inside slot where it attaches to an Apple power adapter. Redesigned adapters have a 3-letter regional code in the slot (EUR, KOR, AUS, ARG or BRA).
More information can be found here –