According to their website, the V3 under load gives 5.5 - 6.0 V. If we assume 6 V, we can calculate the wattage given a particular resistance of an atty: Watts = volts*volts/ohms. With a regular 510 atty (~2.3 ohms), this will give about 15.6 watts...which is a lot for an atty to handle. Some 510 attys can be as low as 2.1 ohms, which pushes it up to 17 watts.
You didn't specify what kind of atty you were using, so I gave the 510 as an example. Most people at 6V use attys with higher resistance (so called high-voltage attys). These are generally around 5 ohms, some more, some less. 5 ohms with 6 V will give about 7 watts. They will last longer, and I personally would find the wattage more in the range I enjoy. Have a multimeter is a good idea when going to HV, or even at 3.7 V, since atty resistances can vary greatly, between each other and over time for a particular atty.
Another issue with HV is keeping the atty bridge wet. Cartos sort of wrap the coil up with wet filler, but attys need to be kept wet or else they overheat, and with 6 V that can mean death fast. At 16 watts, this is a challenge, as it is too much for carts in general, and so you have to drip and be very careful.
I did note that from the webpage for the V3, in the second review video the reviewer said he blew the atty that came with the V3, so it looks like you are not alone here!
Nhaler.com has a range of attys in terms of ohms, from low resistance to high:
Atomizers
If using a high resistance atty does not fix your atty-
vaping issues, I would contact PS.
