I try to stick to the devoted battery resalers like Liionwholesale, illumn, or imrbatteries. While the standard vape companies may have the best of intentions and want to sell authentic batteries, I know say Liionwholesale tests each batch of batteries so they know they're selling the real deal. I doubt these other companies put the batteries they get through the same testing, I imagine if they did we'd know about it.
Ok didn't know there was a max wattage. Thought the amps shows how lower you can safely build. So what would the max wattage for the vtc4's be?
Wattage is Amps * Voltage, so just theoretically a 20 amp cell is 20a*4.2v = 84w, but we know there will be voltage loss and battery sag so 4.2v is quite unrealistic. I've seen 75w as a standard which would be about the 3.7v I usually assume for battery sag/voltage loss on a fully charged battery. Roberts 50w rule is pretty solid assuming all that and covering for a drained battery.
Yea that's what I figured. On 20 amps you shouldnt build lower then .20 right? I figured if I don't go any lower then .25 which is what my normal build is around I should be good. I vape at 70 watts but I have the preheat on the Dna 200 set to 120 for 2 seconds
On a regulated mod you don't have the same limits as you normally would. Your mod is going to take the input of your batteries and manipulate it with some sort of buck-boost type system to give you the output you need for the settings you're at. Now, a regulated device will cut you off eventually, many out there are set to not do anything less than .1Ω, and a lot of them will cut you off if you hit certain max output criteria. Like say the Cuboid for example has a 25amp output limit so even though it'll fire a .15Ω coil, you'll get at most ~94w out of the device even if you set it to it's max 150w. So simply put, you're not at the same limits that Ohm's Law dictates when you jump to a regulated, but you do still have limits.