The Consumer Product Safety Commission announcement, formalising the action announced by the South Korean giant, said the recall affects 1.9 million handsets, including the one million announced in a September 15 recall.
"Consumers should immediately stop using and power down all Galaxy Note 7 devices, including Note 7 devices received as replacements in the previous recall," the agency said in a statement.
Samsung announced earlier this week it would recall all the Note 7 handsets worldwide, including replacements, and halt production of the flagship device in a massive blow to the world's biggest smartphone maker.
The company said in a separate statement from its US headquarters today it would offer a USD 100 credit to customers who want to exchange the Note 7 for a different Samsung device.
"We appreciate the patience of our consumers, carrier and retail partners for carrying the burden during these challenging times," said Tim Baxter, president and chief operating officer, Samsung Electronics America.
"We are committed to doing everything we can to make this right."
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