I have the copper BFM already and absolutely love it..my brother has the dual 26650 (parallel) box mod from VosVape..my clouds are damn near as big as his with my single 26650 copper BFM..two 26650's in series might be too much, but its worth thinking about...lolI personally like my parallel 26650 box mod. I've been using .08ohm dual coil for two weeks on it. My batteries will last me an entire day until I go home and for a few hours at home. Lol, you should compromise. Dual parallel 26650s run in series. No such thing as unnecessary, lol. Double your voltage, quadruple your amp limit.
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