Nearly 1.5 million OCOOPA rechargeable hand warmers have been recalled after reports that the devices can overheat, catch fire, and cause serious burn injuries. United States Consumer Product Safety Commission - OCOOPA Rechargeable Hand Warmers Recalled United States Consumer Product Safety Commission - OCOOPA Rechargeable Hand Warmers RecalledWhy Are They Being Recalled? According to the CPSC, the lithium-ion batteries inside the recalled hand warmers can overheat and ignite, creating a serious fire and burn hazard. Officials are urging anyone who owns one of the recalled hand warmers to stop using it immediately. The recall affects several OCOOPA rechargeable hand warmer models sold online between September 2018 and May 2026.