Thanks Rockproof...I'll give it a try! I have an Altsmoke Omega that usually runs an 18650 at 3.7 volts which I've been using the DCA's at 1.6. I'm thinking about trying out the 17670 4.8v 600 mAh battery since they say it will fit all your 18650 devices etc. I know battery life will go down quite a bit, but I'm not a heavy vaper so I really don't think it will bother me.