I haven't noticed my Cylon being a battery hog at all, but I use puny wattages and have a lot of setups going. Efficiency of the chip probably matters, but also all the bells and whistles may play a role, I mean, but some of those factors can be turned off/shortened and etc. But really, if I had to point to a battery hog it would be my revenger. It's kind of hard to determine, but I have not once picked up my Cylon to vape it and gone "WTH" at batteries being discharged overly fast. It seems to get pretty decent battery life overall.
Depending on the age and capacity and vaping style you use, all that may also be different depending on those factors. I use the Cylon pretty frequently.
Anna