If you're dependent on vaping nicotine instead of smoking
tobacco, perhaps you should read this before buying that
next mod or other gear.
500 ml (a bit over a pint) of 100 mg/ml (10%) nicotine base
only costs about as much as a carton of cigarettes. It keeps for
years in the freezer and will...
You need at least two "e-cigarettes," a primary and a backup. That includes the battery, where you'll want one to use while the other's charging, as well as the liquid delivery device. Many agree on the need for backups of backups. I also recommend you get at least two USB-powered battery...