Vape mod manufacturers label the vape with their ohm rating based on how much heat the atomizer can produce inside the coil. Ohm is the unit of electrical resistance. Basically, the more the resistance, the hotter the coil gets. These days, the most popular atomizers are sub-ohm tanks with a coil rated below .5 ohms. Coil. Rechargeable Lithium-Ion 18650 e-cig batteries have an overall battery life of approximately 300 charges. 2. E Cig Chargers and USB charging cables: You must have a charger to charge your e-cig battery to function. In vape accessories, we have a selection of e-cig charging cables and wall adapters. We have standard eGo threaded e-cig chargers.