DDiesel 21700

Turn your 21700 DD into a single tube device! Use the DDiesel 21700 Top + DD + 1 DD Donut contact to convert your DoubleDouble into a single tube device (button housing sold separately). Donut contacts are not included with the purchase of a DDiesel top. Operating Instructions: >>> Step 1: Tighten Battle Deck onto DDiesel, set aside. >>> Step 2: Thread button housing onto DoubleDouble device, then insert battery- positive side up. >>> Step 3: Place DoubleDouble Contact on top of battery. >>> Step 4: Thread DDiesel top onto DoubleDouble and adjust housing for battery rattle. Donut contact required for use, sold separately.