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Ohm's Law

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  • Ohm's Law

    Hi guys, have a little confusion about the Ohm's law on a regulated device. Now say my nominal voltage of the battery is 3.7v, and I want to vape at say 45W with a 0.5ohm coil.
    1. The voltage which is displayed on my screen is the battery voltage or the voltage required to push out 45W or power?
    2. Should I always ensure that the voltage displayed on the screen is lesser than 3.7v?