The majority of vapers using low powered devices such as AIO’s, Pod systems, Vape Pens and or MTL (mouth to lung) tanks, generally require higher levels of nicotine, say 12 to 24 mg/ml. These devices generally utilise a wattage level of anything from 8 to 20 watts – coil resistance dependent.
High wattage devices, and or sub ohm tanks, say anything over 20 watts, are best suited for lower nicotine levels; 3 and 6 mg/ml being the most common.
A calculator will help determine how much nicotine needs to be added, as well as additional PG & VG. Wick and Wire has a nice easy to use calculator for Doublers.
Doublers are available from –
Wick and Wire
Vapoureyes
The Steamery