#7.5 watts 2.0 ohm mod#
One final, and critical piece of advice: ALWAYS assume that your battery voltage is the equivalent of a fully charged battery: 4.2 volts for a single battery mod or parallel battery mod, or 8.4 volts for a dual series mod. Ohm’s Law won’t figure any of that, and a site like Steam Engine can be helpful. There are other considerations like coil ramp time and the heat of your coil that are determined by wire gauge and mass. It’s all good information to help you stay within the safe limits of your batteries and to tweak the amount of power at your coil to help you achieve your own vaping nirvana. The resistance formula allows you to calculate a safe low resistance based on the CDR of your battery. If you decrease resistance, current and power will increase. As you increase resistance, current and power will drop off. These will allow you to figure out the current your coil will draw and the wattage that will result. Really, the most useful formulas for vapers, are the three that calculate current (I = V ÷ R) power (P = V x I) and resistance (R = V ÷ I). For example, when the battery reaches 3.7 volts with the same load, the current will drop to 7.4 amps (3.7 volts / 0.5 ohms) Also note that as the battery depletes, the current will also tail off. Don’t forget that using a dual mechanical mod in series configuration will double your amp draw per battery, and you will have to build coils with twice as high resistance to be safe. If your battery has a 10-amp limit, you are well below the cap. If your coil is 0.5Ω, you now have everything you need to determine current, in amps: I = 4.2 V ÷ 0.5Ω (or 4.2/0.5) I = 8.4 AĪs you can see, with your 0.5-ohm coil and a freshly charged battery at 4.2 volts, the resulting max current draw will be 8.4 amps. If you are using a mechanical mod, with a freshly charged battery you theoretically have 4.2 V available to power your coil. Let’s put the formula to work in a real-life example. How did we arrive at that? Look at the triangle and you will see that to solve for current (I) you must divide voltage (V) by resistance (R). If you want to determine the current draw through a resistance (your coil) the formula is: I = V ÷ R (or I = V/R)