Your AmazonBasics-branded portable battery could need to be returned immediately, according to the U.S. Consumer Product Safety Commission.

More than 250,000 units of the company’s portable batteries have been recalled after concerns of overheating and ignition became known. Various customers have reported their units reaching temperatures so high that starting a fire is possible.

The product ID number is printed on the back of each unit, and that’s where you’ll be able to find whether or not the recall pertains to you. If you do have a unit listed in the recall, you need to stop using the portable battery right away and contact Amazon’s customer service team.

Here are the product ID numbers affected:

  • B00LRK8EVO
  • B00LRK8HJ8
  • B00LRK8I70
  • B00LRK8IVO
  • B00LRK8JDC
  • B00ZQ4JQAA

Amazon is also reaching out to customers, but there may be some who purchased their portable batteries from a third-party seller or received it as a gift. So it’s very important to check the product ID number rather than to wait on a notice from the company.

The recall listing on the U.S. Consumer Product Safety Commission’s site says around 260,000 units sold between December 2014 and July 2017 are affected.