i can't find the VTC5A on the website im ordering from...what about the purple efest 35A? better or worse than the VTC5?VTC5A is the best you can get for that...but 220 watts is an illusion.
Depends on how high you'll be vaping.
Watts+10%(for device inefficiency)/cutoff voltage for mod (usually 3.2v)=amps. In series mods (like most variable wattage ones out there) you mulitply the cutoff voltage by the number of batteries.
eg: say you want to vape your Alien at 100w: 100+10% for inefficiency (110w)/3.2v*2batteries=6.4v so 110/6.4=roughly 18.2a.
The VTC5 is a 20a cell, so you'll reach it's constant current limit at 128w. if you don't plant on going over 110w, you should be just fine with them. I don't rely on any pulse current mumbo jumbo
please don't blow yourself up with the rewrapped efests... they are NOT 30A nevermind 35A...i can't find the VTC5A on the website im ordering from...what about the purple efest 35A? better or worse than the VTC5?
This is a wonderful talk about batteries with Mooch and the Vaping Biker. I would feel 100% comfortable running VCT5As at 220w on the Alien, wouldn't get the best battery life, but it would be quite safe, even the VCT5s would be ok. In general, for battery life, I try to keep my pulse amps under the continuous discharge rating when possible.
Except that when combining batteries you get a cumulative effect. That means you can easily put a 40amp load on a set of 25amp batteries and have a 10amp safety margin. Of course, that only really matters if you are going to hold the fire button for hours at a time. The Sony VCT5As can safely be pulsed well above their continuous rating. Take a look at Mooch's pulse charts.