You would be correct. It needs enough to open the contactors which allows the high voltage battery to send power via the inverter to charge the 12V My Lithium

You would be correct. It needs enough to open the contactors which allows the high voltage battery to send power via the inverter to charge the 12V My Lithium Ion jump pack is tiny, about the size of two iphones stacked on top of each other, and a single jump uses only a few %.