i'll look into it thanks. is 11 watts enough for the bigger tanks/rbas?
It is not the RBA or the RDA you are using. It is the coil resistance you use. I run Kayfun atomizers on a Provari, a Vamo, a Innokin iTaste VV V3 and regular eGo style batteries, VV and without VV, without any problems.
All of them have coils from 1.4 to 1.8 ohms and work on all those battery devices.
The size of the tank that holds the e-liquid doesn't matter. Big small it doesn't matter. You can even use dripping atties on those batteries if the coil or coils, dual coils, installed in them come up to the resistance the battery can handle, 1.3+ to around 3 ohms.
11 Watts is plenty if the coil resistance is in the 1.4 to 2 ohms range.
11 watts on a 1.4 ohm coil will give you 3.9 volts delivered to the coil. I personally vape with a 1.4 ohm coil between 3.4 to 4 volts depending on what type of vape I want.
All this higher watts stuff comes in with coils or dual coils below 1 ohm, AKA Sub-Ohming. Coils wrapped to .7 ohms or lower.
With a .5 ohm coil at 3.8 volts you would be at 28.8 watts. You are still with that 3.4 to 4 volt range.