Michigan-based company myCharge is recalling over half a million portable battery chargers sold nationwide at Costco due to reports of overheating and residential fires. The recall affects the myCharge POWER HUB All-In-One 10,000mAh chargers with specific model numbers sold between January 2022 and November 2023 for approximately $40. Five overheating incidents, including two fires, have been reported with these chargers, prompting the recall. Customers have reported issues such as melting, expanding, smoking, and sparking. Although no injuries have been reported, owners are advised to stop using the chargers immediately and contact myCharge for a replacement. The company can be reached via phone, email, or their website during business hours for further assistance. It's crucial for consumers to take action to ensure their safety and prevent potential hazards.