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E-Cig Batteries: Fixed vs. Replaceable

Samsung 25r 18650 battery

E-Cig Batteries: Fixed vs. Replaceable

Knowledge of batteries and battery safety when vaping is crucial for beginners and experienced vapers alike. While they are often a forgotten component of a high-end device, understanding the different batteries and which batteries to use can be one of the most important safety decisions for vapers.


First, let's differentiate between replaceable-battery mods and fixed-battery mods. Most entry-level mods including eGo types and some intermediate-level devices like the Innokin MVP series have built-in lithium polymer (LiPo) battery packs. A few high-end devices like the eVic VTC mod also use these batteries.

With a fixed battery, the benefits include compact size, ease of use, and the mod manufacturer programs the device so it doesn't fire beyond the battery's safe capabilities. These usually charge via an included USB cable, with either a micro USB or proprietary input to connect to the device.

The drawback, however, is battery life – once your battery dies (anywhere between 100 to 1000 or so charge cycles), your mod is dead. And if your battery reaches the point when it needs a charge, you're out of commission until you can spend some time plugged into a power source.

For this reason, replaceable battery mods are the most commonly selected battery in the high-end mod market. Check out our next article on battery sizes to learn more about what batteries you should be vaping with.