I just figured $0.55 a flight if I use it up. Lekkie batteries last about 50 to 100 flights if you are lucky. I am not because I don't use them enough. I find that I get bored after 3 flights on a plane any given day. I have a few .049 and .06 planes that might be 2 bits ($.25) a flight, and are just as much fun if it is not windy. They are about equal to a 1200 mah battery type plane. Actually I will be working on a leckie today about that size. But will not doom my glows yet. You are in Warren, not really far. Bit over an hour if the border isn't busy.