Alcatraz wrote, "A Purple-days draws 8W from a 12V source, so has a resistance of around 17 ohms. That means that it would draw 8.7W from a 13V source, with a current of .76A, or 760mA."
Alcatraz does not work for Purple-Days Diffusers and cannot speak for us.
BTW if you start plugging approximations into a math problem the answer is an approximation... So, he may be close, but no cigar.
Warranty covers the use of our wall wart and car adapter only. Once you start experimenting it's your baby. What would you expect? :/
As stated the unit is made to work on 12 volts and will withstand a car alternator output, however the higher car voltage seems to be offset by more air movement and therefore increased cooling.
LEDs are vulnerable to heat, and as you increase the heat you increase the chances of LED failure.
If you want smoke, get a pipe or bong or a pack of papers.
If you want high vapor temperature I suggest the Silver-Surfer Vaporizer, you can turn it as high as you like. And there are several sensible PD owners who own both and use them for their intended purpose.
The Purple-Days is designed to operate in the vapor zone at a 12V @ 1A input.
Folks seem to agree that it produces vapor, full vapor, at this temperature. Higher temps means the release of more toxins. That is not what we intended.
We do not endorse 13Volt. And I did not say 14 Volts was OK, ever.
Operating at 12 Volts and at the 'right' temperature, and with the right mass and design, is why this thing is efficient.
Really, you want higher temps, get a Silver Surfer, not a Purple-Days...