12v heated blanket should also carry relevant automotive safety certifications if intended for use in vehicles.'>Certification marks are crucial indicators of a safe electric blanket. When purchasing a cheap electric blanket, make sure it has certification marks from trusted organizations like UL, ETL, or CSA. These marks indicate that the blanket has undergone rigorous testing for safety and performance. Additionally, check for any specific marks that relate to your country's safety standards. A 12v heated blanket should also carry relevant automotive safety certifications if intended for use in vehicles.