Mon, I don't think evolve dna works at 30 watts with one battery. All my experiments shows me that these batteries cant really handle those watts. And by saying this, I mean that if a battery lasts 3 mins at 30 watts, that's not something we really care. Vaping isn't made for 3 mins if you agree.
There is no problem for Proteus if a user tries to vape at more than 15 watts. But battery will last much less.
As for batteries, I think its time to tell you something that only a few people know. 2x18350 batteries last longer and can handle more watts than 1 single 18650 battery even if its 4 times bigger. And because you mention dna, I think it cant handle 2 batteries in a series, so you don't have many options there and you don't have the power you really need. You are limited a lot
Of course maybe I am wrong about dna. If I am wrong then better put 2x18350 batteries on your mod and you will see how more pleased you will be
Totally agree! If you want to see the difference between an 18650 and a pair of 18350s stacked, get your hands on a Vamo. That device is soooooo much better with stacked 18350s.
As for the DNA30 chips, they don't have any buck circuitry, so there is no step-down in the voltage. Therefore, stacking batteries will get you 7.4 volts whether you want it or not, no matter what you were to set the watts at. I'm not sure which would fry first, your coil or the electronics.
As for stacking batteries, there is nothing inherently wrong with it. With remote control vehicles, we use multi-cell packs all the time, and those are made of Lithium Polymer cells, which are far less forgiving than the IMR batteries that ecigs use. We just have to use a special balancing charger to equalize the charge of each cell. See, if you have more than one cell, the volts are measured across both cells, so if your 2-cell pack is reading 6 volts, you might have a cell that is 3.2 while the other is 2.8. This can cause problems in charging, as one cell could get over-charged if it didn't discharge as much as the next cell. That's why we balance charge, to make sure a cell doesn't overcharge, then balloon, then vent into a fiery inferno. The great thing about ecigs is that our cells are separate, so they are always being charged individually.
That being said, over-discharging can cause serious problems with lithium cells, which could end up causing the fiery inferno mentioned above. Therefore, special care should be made when using with a mech mod, or just not used at all in those circumstances. When used with electronics with a voltage cutoff, you're safe, as long as you check the volts on your cells on occasion after discharge to see how low they are going before cutoff. And, its preferable to have "matched" cells so you know they are discharging at the same rate. Cell matching is something that is a bit of an art form, and to do it properly, requires a special charge with discharge function that charts statistics during the discharge.
My charger actually hooks up to my computer to show the discharge curve. The alternative would be to go old school like I used to do and when you pull the batteries out after discharge, write down the voltage reading and internal resistance (which requires making a resistance coil for testing, as it must be done under load) in a logbook.