I just got my new chrome VAMO, new Trustfire charger, 1 Efest IMR 18650, and 2 Efest IMR 18350 batteries the mail. The 18650 is charging now. My question is what wattage is safe to use with my vivi nova's, one of them has a 1.8 ohm atty on it and one of them has a 2.4 ohm atty on it. What is a safe wattage to use on each atty separately? I don't want to burn up a coil if it can be avoided.