This page shows our range of dual battery devices. By having 2 sets of batteries and an external charger you no longer need to wait for your device to charge, you can just swap batteries and go. Batteries also degrade over time and use, and so having a device that has easily replaceable batteries can keep your vape going for longer. There are some advantages of having a dual battery device over a single battery, youll get double the battery life (depending on how much power you run through your coils), as well as being able to run your vape at higher wattages. This makes dual battery kits perfect for sub-ohm vaping, which requires you to run at higher wattages. These devices are compatible with 18650 batteries and 21700 batteries, from beginner to pro models. Some are capable of using multiple types of battery with an adapter, but it's always worth checking the product page to see which batteries your mod is compatible with.