Choose a CartomizerWhat cartomizer fits my battery? Can I use a Smileomizer with a Vapor King battery? Does a tank fit my eGo? Do these questions sound familiar? People new to vaping, or even people who have been vaping for months or years can have a lot of questions when it comes to using refillables. That's OK because the vaping world is huge and there are lots of gadgets to choose from! This guide will help you figure out what carto fits which vaping battery. All ecigs need e-liquid in order to work. The e-liquid is stored in a compartment before the battery vaporizes it. There are tons of ways to store this juice. There are pre-filled cartomizers, blank cartomizers, Smileomizers, eGo mega carts, and tanks. Each of these serves the same purpose - they house the vaping e-liquid. The main variables in refillables are the type of coil, their resistance, connector threading, and capacity (how much juice they hold). It's important that the refillable you use works with your ecig battery.  Luckily, we've made pairing the right items together easy. All of our batteries work with all of our refillables! The only exception is the eGo mega cart which only works with the eGo battery. If you're techy or like learning about science of vaping, then understanding how resistance, voltage, and current work together can be fun. When you have the perfect combination between voltage and resistance, that's when you find your vaping "sweet spot." Ohm's law shows the relationship between these three variables. The greater the battery voltage, the greater the current. The greater the resistance, the less the current. Charge flows at the greatest rates when the battery voltage is increased and the resistance is decreased. Volts divided by resistance equals amps. Amps times volts equals watts. The higher the wattage the higher potential for vapor production and throat hit. The higher the wattage, the shorter the battery life, and hotter the cartomizer will get.   Resistance is measured in ohms. Each refillable has an ohm rating and depending on that number, will work differently with different batteries (because batteries have different voltage levels). Smileomizer The Smileomizer is a giant cartomizer that holds a lot more liquid than a regular cartomizer. Smileomizers have chewy mouthpieces that are great for holding the ecig in your mouth. Smileomizers work on all the batteries that Vapor4Life carries, but look best on the Vapor Zeus and Dial-A-Volt batteries.  Smileomizers have a resistance of 2.5ohm, so the batteries that work best with them has a voltage between 3.2 to 5 volts. Smileomizers come in two sizes (small - 3.5ml and large - 6ml) and they both fit all sizes of the Vapor Zeus and Dial-Volt batteries. If you want it to fit flush (which looks the best), then get the small size for all sizes of the Vapor Zeus and Dial-A-Volt, except the XL. The XL Vapor Zeus and XL DAV look best with the Large Smileomizer. Blank CoolCarts Cartomizer Vapor4Life carries two types of blank cartomizers. The difference between the two is the amount of resistance they provide. CoolCarts have 3.4ohm, and these run a little cooler than WOW Vapor cartos. CoolCarts work on all Vapor4Life 808-threaded batteries, but work best on Vapor Titans, Vapor Kings, and USB Passthroughs. CoolCarts provide a strong throat hit and bring out the true flavor of a vape. They hold a little more liquid than WOW Vapor cartos. Blank WOW Vapor Cartomizer The WOW Vapor Cartomizer runs warmer than CoolCarts at 2.5ohm. They produce a lot of vapor and a strong throat hit. WOW Vapor cartomizers work on all Vapor4Life batteries, but because of their size, look best on Vapor Kings and Vapor Titans. If you like using the USB passthrough, then you'll want to stick with a CoolCarts cartomizer. The passthroughs run at 5 volts which when paired with a low resistance cartomizer can produce burnt juice. Tanks Our tanks are acrylic holders with cartomizers inside them that can be removed. The cartomizer works like a regular cartomizer, but the extra room surrounding the cartomizer allows it to hold more liquid, so you don't have to refill as often. There are two sizes - 3.5ml and 6ml. The cartomizer is the same size for both, the added size comes from the acrylic holder surrounding the cartomizer. The tanks come with a 1.5ohm dual coil cartomizer inside. When the cartomizer gets old, it can be replaced. There are many different replacement cartomizer options. You can find detailed info about this right here on our ecig blog. Our tanks work on all of our batteries, but look best on the Dial-A-Volt and Vapor Zeus. Please let us know if you have any questions! Leave a comment here, call us at 1-844-VAPE4LIFE, or tweet us @Vapor4Life.