Evolv released the first "variable wattage" (variable power) e-cigarette on the market in 2010.[1] The Darwin, was able to output up to 12.7 W.[2] After the Darwin had paved the way, variable wattage soon displaced variable voltage as the default mode of control for advanced personal vaporizers. Retired in 2012,[3] the Darwin was the first and the last complete e-cigarette produced by Evolv.