1 - Boost Converter: DealExtreme (154870) 1 - USB Connector Type A Socket U04 6 - Magnets (1/8" x 1/4") 3 - Screws M3x60mm 3 - M3 locknut 1 - 200 Ohm resistor 6" of spring steel (mine is 0.84mm which is a bit too thick) 1 - 18650 Lithium Ion Battery (PCB protected)