I just got a New Starter Kit and 2 New Atomisers this week (the Classic RN4072's with the white matt finish) and all of them heat up within the first ten or so drags to the point where i can't hold them. The very first Atomiser i got (same style and battery) has Expanded so a cartridge is so loose that they just fall out.

I've tried New Fully Charged Battery's and New Cartridges in them all and it's still the same. Have to put them down till they cool off. Ther's got to be something wrong with the batch. I can't be so unlucky as to get either 4 duff atomiser's or 3 duff battery's or 30 duff cartridges at the same time. One High Strength Cart is lasting about 30 drags before it's dry and i'm not really getting a lot of smoke either.
'tis a puzzlement and very annoying.
How old and what type are you using DeviLFisH 'cause like you "new cart just few puff it get hot man" but in my case new cart, new atomiser, new battery x3 it get's Very Hot man.