As the latest iteration product of Samsung, more than 35 reported Galaxy Note 7 battery explosion cases happened within such a short period after the launch date, and the recall is happening during their initial rollout phase. This is a serious and heartbreaking news for the Samsung users. It has been confirmed that the problem comes with the battery. The quality and protective mechanism of battery plays a key role to keep us safe. As one of the most commonly used external battery pack, the safety of power bank basically relies on the battery cell inside as well.