If you want to cut down on the
throat hit and vapor production of the 510 manual battery, and don't mind using an automatic battery, then what you need is a 306 battery, not a 306 atomizer.
You can use a 306 battery with the bigger cartridge of the 510 atomizer, and it gives a really nice and easy hit. There is still a good vapor, but it isn't as hot and dense it doesn't put the smackdown on your throat.
And some other added benefits are that your
juice will last longer in your cartridge, so you won't have to top off as often, and the flavor is also a little bit better as well.
I actually like using my 510 cartridge with my 306
batteries sometimes.