The DeWALT tough system 2.0 charger box is capable for storing up to twelve 5.0Ah batteries with an additional two batteries charging. The case features durable metal buckles that reduce the risk of self opening or breakage. A seal around the internal lid of the case prevents moisture from creeping in. It also includes USB output socket inside the case for charging smart devices and mobile phones. An additional USB output socket is on the back of the case for the same function.