The I-Team has learned U.S. Customs and Border Protection Agents have seized 22 counterfeit hoverboards in Milwaukee.
Across the nation, agents have seized more than 95,000 boards valued at $20 million.
"If you have batteries that are blowing up and starting fires, that could be very dangerous," U.S. Customs and Border Protection Port Director William Braun said.
Videos have been posted all over the Internet showing counterfeit boards malfunctioning.
Agents say the malfunctions have to do with knock-off batteries and cheaply made parts.
"If you see a hoverboard for a great price and you think it's too good to be true, it probably is too good to be true," Braun said.
Key reds flags to spot fake hoverboards include:
-Instructions that are not translated properly in English
-Batteries that do not appear to have a name brand on them or contain modified logos
Many of the counterfeit boards are selling for a much lower price than what you'd find them at in stores.
While possessing a counterfeit board is not illegal, agents say if they seize a board that's on its way to you, you will likely lose your money and not receive the board.
If you already have a fake hoverboard in your possession, consumer experts encourage you to discontinue using it and request a refund.
If the seller is not willing to issue a refund, dispute the charge with your credit card company.