Defective Apple iPhone 3G power adapter (click for larger image)

Apple is recalling a USB power adapter that shipped with the iPhone 3G because it could potentially be dangerous, the company said Friday.

"Apple has determined that under certain conditions the new ultra compact Apple USB power adapter's metal prongs can break off and remain in a power outlet, creating a risk of electric shock," Apple said in the recall notice. "We have received reports of detached blades involving a very small percentage of the adapter sold, but no injuries have been reported."

The affected adapter was shipped with every iPhone 3G in the United States, Japan, Canada, Mexico, and several Latin American countries (a full list can be found here). The adapters sold with the original iPhone or in other countries are not affected, the company said.

Those affected by the recall will be able to exchange their power adapter for a new, redesigned one. Customers can order a replacement adapter from Apple's site and receive it three weeks after they order, starting Oct. 10.

For a quicker exchange, users can get the new adapter at an Apple retail store starting Oct. 10. In-person customers will have to bring their affected adapter and their iPhone 3G, Apple said.

If you have a power adapter with a green dot on the bottom, you have the redesigned product already and don't need to exchange the device.

In the meantime, the company suggests charging the iPhone 3G by plugging it into a computer via a USB cable or with a third-party power adaptor like a car charger.