This thread is a sticky regarding Sub-Ohm vaping. Please feel free to direct your discussion, safety info, and appropriate battery types here, until a dedicated sub-forum can be created.

Special props tosonicdslfor the idea of making this important sticky happen..

Here's some basic info to get things started:

Ohm's Law and VapingOhm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance,[1] one arrives at the usual mathematical equation that describes this relationship:[2]

where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.[3]

Ohm's Law Calculator

Kanthal A-1 Wire Specs: (Ohms Per Inch)

•28 AWG- 0.439 Ohms/in, 0.0508 Diameter (in.)

•30 AWG- 0.696 Ohms/in, 0.0100 Diameter (in.)

•32 AWG- 1.091 Ohms/in, 0.0080 Diameter (in.)

•33 AWG- 1.383 Ohms/in, 0.0071 Diameter (in.)

•34 AWG- 1.758 Ohms/in, 0.0063 Diameter (in.)

Sub-Ohm Vaping Vids:

Resistance & Air Flow - YouTube

Batteries, Volts, Amps and You - YouTube

General Battery Info:

Basic to Advanced Battery Information from Battery University

Basics About Battery Discharging

Batteries and Chargers | BudgetLightForum.com

VapeSafe 2 Safety Fuse For Mechanical Mods

Torchy the Battery Boy: IMR "safe chemistry" batteriesBattery C Rating - The C rating of a battery (or cell) is used to indicate the continuous current draw (amps) the cell will support. By multiplying the C rating times the cell capacity in milliamperehours (mAh), the continuous current in milliamperes (mA) of a cell is easily calculated. Example - For a 2000 mAh battery with a 15C rating, the continuous current that may be drawn out of the battery is 2000 mAh x 15 = 30000 mA, or 30 Amps (A) (divide by 1000). There is also another rating that is applicable to a battery known as peak or "burst" current discharge rating. Peak current is higher than continuous C rating. It indicates that a battery will deliver higher current than the C rating for brief instances.

The above is a handy link to popular IMR batteries of all sizes used for vaping, tested at constant 1A, 5A and 10A discharge rates. There are also specs which include:

Internal Resistance mΩ

Actual Capacity(mAh)

Length (mm)

Diamater (mm)

Weight (g)

A Couple Of Trusted Battery & Charger Vendors:

Welcome to RTD Vapor

Batteries-Chargers-Flashlights-Only The Best

Popular 18xxx Battery Specs & Amp Limits: (Added 2/04/2014)