A good battery is one of the most essential parts of a vape. Only vape juice and atomizers are as integral. Like those components, your battery has to suit your device and your style of vaping. Whether you're looking for high power, long-running times, or something in between, this page lays out some of the best batteries for vaping in 2021. Get the most out of your vape with the right battery.
A vape battery is just a replaceable lithium-ion battery. Not a battery you find in a convenience store, but a regular battery nonetheless. Although vape batteries are often thought of as particular to vaping, they are the same types of batteries used in other electronic devices, like power tools, flashlights, lanterns, laptops, radios, electric bikes, and even electric cars. That said, no major battery manufacturer publicly endorses the usage of their batteries in the context of vaping, and no batteries from other devices should be swapped for usage with your vape mods.
While there is nothing inherently dangerous about using replaceable batteries in a vape device, serious risks to the user and device can happen without basic knowledge of ohms law and safe battery practices. For the stories you hear about a “vape exploding,” at the heart of the issue is basic battery safety, especially for lithium-ion cells. The basic safe practices are:
The most distinguishable feature between vaping battery types is size. These are the most common battery sizes used in vaping:
The less common sizes are:
The specific size is a naming convention pertaining to the dimensions of the battery in millimeters. Therefore, an 18650 is 18 mm x 65 mm. While these measurements are the identifier of the various sizes, cross-compatibility is not always a given due to different positive contacts, particularly with larger batteries like 20700, 21700, and 26650. Some button top batteries can be a bit longer than their flat-top counterparts. Even among flat-tops, some variation can still occur. But by and large, most batteries are cross-compatible with each other for the devices used in vaping with only the occasional few that won’t fit like expected.
While our international team of experts and vape enthusiasts use the batteries on this list, our recommendations and product selection required the use of data offered by Battery Mooch.
Battery Mooch (or just Mooch) is the vape community’s expert tester of batteries. For a few years now, he’s been supplying the community with in-depth and reliable testing for the majority of batteries used in vaping.
This is not his list of best batteries per se, though these batteries have been verified on his battery charts to be worth inclusion. Mooch and his highly detailed research about batteries can be found on his E-cigarette Forum blog, on YouTube, and Reddit.