I like #3, nice clean design and the symbol flows right into the name. The circling arrows seems to force you towards the name. # 1 and 2 looks like the name is "lectrocycle" the first letter gets lost. 4 and 5 the symbol draws away from the name because it is above it. It may work if the name was on top of the symbol. # 6 is not bad but I would have the cord dangling or in a serpentine shape below the name and the colors have to change, the blue makes me think of water not recycling.
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