Camping? Why lug around or buy those huge expensive 6 Volt lantern batteries? This STL will let you run your lantern off four AA batteries. In addition to the STL you will need a length of solid copper wire like that found in house wiring, a couple springs and four AA batteries. Bend the wire as shown. Push the wire into the slot on the bottom, cut the excess off and fold the wire ends down into the recesses on top. Load two batteries in each hole with a small spring between each battery. Then put it in your flashlight and you are good to go!