Logo Ideas for PosiTori

Heres some PosiTori Logo Process. I was really trying to go with a plus sign as in Positive. But its challenging to try to make a plus sign mean something other than medic. You can see my thought process turned from storm clouds to batteries and eventually robots. lol. I don't know either. Anyway this is just round 1. I'm sure some of these would be more appealing if I actually made a vector version of them.