Apple Inc. announced the recall of its USB power adapters on Friday, after revealing that they pose a risk of electric shock. The company admitted having received reports of detached blades involving a small percentage of the adapters sold, however, no injuries have been reported.

According to the announcement, “the new ultracompact Apple USB power adapter's metal prongs can break off and remain in a power outlet, creating a risk of electric shock.”

Apple initiated the Ultracompact USB Power Adapter Exchange program for power adapters purchased either with the iPhone 3G or separately in the following countries: United States, Japan, Canada, Mexico, Colombia, Ecuador, El Salvador, Guatemala, Honduras, Peru, Argentina, Chile, Costa Rica, Panama.

Customers will be able to exchange the affected adapters for a new, redesigned one, free of charge. In the meantime, Apple advised them to charge their iPhone 3G by connecting it to their computer with the USB cable that came with the phone or by using a standard-sized Apple USB Power Adapter or a car charger.

According to the company, the replacement adapters will be available starting Friday, October 10, and customers can choose to replace their current ultracompact USB adapter either via the web, or by exchanging them at an Apple Retail Store.

Apple did not provide an exact number of customers affected, however, considering they sold 1 million iPhones in the first weekend of availability alone, and at least 5 million more in the past months, it is logical to assume that Apple's recall takes significant proportions. The US Consumer Product Safety Commission made no official announcement to date.