Can anyone help e by telling me whether it is safe to vape off my car stereo with usb? Ive tried it and it workks great, but it makes me a bit nervous. I will have aa new quit date sometime next week I only have 2 pks of analogs left, and may just give 1 pk away. Im enjoying vaping in between smokes... I bought a cig lighter car charger usb, that doesnt work...taking that junk back. All replies apreciated!