According to a report by Instrumental, the aggressive design strategy of cramming the biggest possible battery into the smallest possible frame is what caused the Galaxy Note 7 to explode. The large battery inside a 5.7-inch device with all the other features, including a separate slot for the S Pen to fit in, has reportedly been the cause of these explosions. To fit the large battery, Samsung left virtually no space (less than 0.1mm in some places) around the circumference, when the company ideally should have left a 10 percent gap for the battery to expand over time. The compression of the battery thanks to the stress of being placed in pockets, alongside the natural swelling, is reportedly the driving factor causing many Samsung Galaxy Note 7 units to catch fire. Samsung lost billions from the recall.