According to a person familiar with discussions between government agencies and Samsung, the SDI batteries from the first batch of Note 7s were indeed too large for the handset. The regulator also pointed to the battery design within the phone’s rounded edges. Dialog DA9155 charging chip, alongside the familiar MAXIM power IC. Importantly, this DA9155 does not appear to be found inside the Galaxy S7 or S7 edge. This chip is a slave charger that extends the current capabilities of a master power IC for increased charging currents up to an additional 2500mA . It’s controlled by the application processor (AP) and, interestingly, kicks in during the high-power constant current charging stage. A combination of causes “[Samsung] was too quick to blame the batteries; I think there was nothing wrong with them or that they were not the main problem,” – Park Chul-wan, former director of the Center for Advanced Batteries at the Korea...