More than half a million portable battery chargers sold exclusively at Costco are being recalled after 120 reports of overheating, posing fire and burn hazards, including two reports of residential fires caused by the chargers.

Michigan company myCharge is recalling around 567,000 POWER HUB All-In-One 10,000mAh portable chargers with model numbers AO10FK-A, AO10FK-B, and AO10FK-C, according to a notice posted by the U.S. Consumer Product Safety Commission.

The recalled chargers are black and include two attached cables for charging portable electronic devices, and retractable wall prongs to recharge the power bank. A four-digit date code is printed on the outer surface of the wall prong, in WWYY format representing the week and the year. Recalled chargers have date codes ending in 21 or 22, or four codes ending in 23: 0123, 0923, 1523, or 1723.

The chargers were sold exclusively at Costco stores nationwide and online at Costco.com from January 2022 through November 2023 for about $40.

There have been 120 reports of the recalled chargers overheating. MyCharge received five reports of incidents, including two residential fires, that resulted in approximately $165,000 in property damage. Costco said it received 115 returns of the chargers for reasons that mentioned "melting, expanding, smoking, fire, burning, exploding, or sparking."

There have been no reports of injuries requiring medical attention.

Consumers should immediately stop using the recalled portable chargers and contact myCharge for a free replacement.

The recalled chargers contain lithium-ion batteries, which must be disposed of in accordance with state and local regulations. Municipal recycling centers have procedures for discarding potentially hazardous damaged/defective/recalled lithium batteries.

Consumers are warned not to throw the recalled batteries in the trash, or to deposit the recalled battery in used battery recycling boxes found at retail and home improvement stores.

--with reporting by TMX