User blog comment:Usiar/Heimerdinger Updates/@comment-4442345-20120718195009/@comment-3067750-20120721043246

Don't forget about the Enery Blast they were given in these PTR notes. Its an 850 Range skillshot that deals 72-144 (+0.45 per AP) damage with a 200 range Area of Effect. These Energy Blasts occur every 9 seconds.

Also, Electron Burst Grenades have some effect on Energy Blasts that from my understanding would allow a Heimerdinger to almost instantly allow a 2nd Energy Blast to be fired by a turret that just fired one.