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 to sonicdsl for 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, one arrives at the usual mathematical equation that describes this relationship:
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.
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
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)