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 re…