#166 There are a lot of meanings i put into this logo, Circles represent energy flow, first 2 circles assemble an infinite symbol, as the energy can't be destroyed just transformed, so energy is infinite, and the whole emblem of circles are formed by 3 lowercase "a's", besides that, in the first option (#114) the three circles also could represent a battery pack, which are carriers for energy... i also mantained a bit of that into option #166. The main thing is, that besides the fact of all what the logo represents, it's a very eyecatching symbol easy to remember, and also very easy to reproduce and play with...
I took a different approach from what's been around... let's see what you think... it's a series of 3 A's ressembling airflow from heat to cold, going out of an AC vent