Is there one? I remember seeing one that cross-referenced atomizers with batteries. All the different kinds but I am just unable to find it. If someone knows where this chart is I will post it here in the main post for quick reference to others. I'm really looking for the Ohms between a standard 510 and a LR 510 as well as standard 510 cartos so I can evaluate how short I should cut my nichrome. Thanks guys!