Lithium batteries the culprits in Samsung Note 7 debacle, company finds

It was overheating Samsung Galaxy Note 7 incidents that prompted a worldwide recall and months-long investigation by 700 Samsung engineers.Over 200,000 devices and more than 30,000 lithium-ion batteries were tested.Samsung found that a design defect -- incorrect battery positioning in the Galaxy Note 7’s upper right corner --caused the first wave of problems. Then some replacement devices had a manufacturing error; An abnormal weld that led to internal short circuits. Samsung batteries und