zero nic cigarettes Less NC15000 Nicotine Tobacco Disposable with two devices per aroma Photo by Michael Silverstein (@mikesilverstein90)

Christiani, MD, wrote in an editorial in the New England Journal of Medicine

Dual USB interfaces, 2.1A single-output (max total output of 4.2A), quickly charges for 2 USB-devices simultaneously, great for most cellphones, tablets, GPS, digital camera, PSP/MP3/MP4, PC and other USB charging devices With Overload, Over-charge, Over-volts, Over-current and Short Circuit Protection to ensure charging safety and protect your device

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E-cigarettes heat liquid nicotine into a vapor, delivering the chemical that smokers crave without the harmful by-products generated from burning tobacco