Will companies have varying sizes to progressively appeal to light or heavy smokers
If your device use Alkaline battery AA or AAA , then each piece is 1.5V, 2 piece choose 3V, 3 piece choose 4.5V, 4 piece choose 6V, etc [IMPORTANT] DC Plug Polarity: inner Positive(+), outer Negative(-)
Traceability systems are advantageous
They fear gaining weight post-cessation, but with the right method there is no need for substitutions or the desire for them
Also, the warranty is 18 months, compared to Scosches three-year warranty, and it costs a dollar more at this writing
Blended options offer a balance that appeals to most smokers