The process for picking a coil and battery for a mech is pretty straight forward.
1. Choose a (realistic) power level
2. Use ohms law and/or steam-engine to choose a coil/s that provides this wattage
3. Calculate what amp draw this will generate.
4. Pick a battery that of a known and proven CDR (continuous discharge rate) that matches this amp draw, with some safety headroom.
A fully charged 18650 will be at 4.2 volts
If you use two coils then the total resistance will be halved, ie. two 0.5 ohm coils will result in a total resistance of 0.25 ohms.
0.25 ohms at 4.2 volts is 70 watts and will draw 17 amps.
The Samsung 30Q or the LG HG2 would both be great choices for this particular setup.
Remember that this is theoretical. In a real world example you will be lucky to get 60 percent of that wattage due to the inherent losses in unregulated systems and battery sag. So you would be looking at about 50ish watts to your atomizer. Also as with all unregulated devices, that 4.2 volts will quickly drop off to under 4 volts and will continue to decrease along with the output wattage as you vape.
Choosing simple round wire based coils rather than exotics like claptons is more likely to achieve good results as the more wire the coil/s is comprised of, the more mass needs to be heated leading to slow ramp up times and potentially a poor vape.
Mooch's Recommended Batteries | E-Cigarette Forum
List of Battery Tests | E-Cigarette Forum
1. Choose a (realistic) power level
2. Use ohms law and/or steam-engine to choose a coil/s that provides this wattage
3. Calculate what amp draw this will generate.
4. Pick a battery that of a known and proven CDR (continuous discharge rate) that matches this amp draw, with some safety headroom.
A fully charged 18650 will be at 4.2 volts
If you use two coils then the total resistance will be halved, ie. two 0.5 ohm coils will result in a total resistance of 0.25 ohms.
0.25 ohms at 4.2 volts is 70 watts and will draw 17 amps.
The Samsung 30Q or the LG HG2 would both be great choices for this particular setup.
Remember that this is theoretical. In a real world example you will be lucky to get 60 percent of that wattage due to the inherent losses in unregulated systems and battery sag. So you would be looking at about 50ish watts to your atomizer. Also as with all unregulated devices, that 4.2 volts will quickly drop off to under 4 volts and will continue to decrease along with the output wattage as you vape.
Choosing simple round wire based coils rather than exotics like claptons is more likely to achieve good results as the more wire the coil/s is comprised of, the more mass needs to be heated leading to slow ramp up times and potentially a poor vape.
Mooch's Recommended Batteries | E-Cigarette Forum
List of Battery Tests | E-Cigarette Forum
