Please note the warnings listed in the following section to avoid accidents! Even if you already have experience with e-cigarette batteries, there are a few things to keep in mind.

• A defective shrink tube (the film around the battery) should be replaced immediately if the cell is not otherwise damaged.
• Only charge your batteries in designated chargers.
• If you carry spare batteries with you, please be careful not to leave them in your car or on a table in direct sunlight or expose them to extreme heat or cold.
• Do not use damaged batteries. Cells with defective outer casings, such as dents, should be disposed of immediately.
  Please note: Battery cells do not belong in household waste. This means these rare raw materials cannot be recycled, and toxic substances end up in unintended recycling streams. You can dispose of them free of charge in collection boxes, which you can find in almost every supermarket or municipal waste disposal site. Further information can be found >here.
• Regardless of whether you're using a mechanical or regulated vape, you should always stay within a resistance range of <0.10 ohms. While ranges of >0.10 ohms are not uncommon with mechanical vaping, you should know exactly what you're doing with such high-performance setups and never leave the quality of the hardware to chance.
• Last but not least: Even if you are an old hand, please always use a regulated device with protective electronics to anneal your handmade coils.

Lithium-ion cells are the most common in e-cigarettes. They don't always have to be the best or most expensive, but when it comes to your own health, it's wise to dig a little deeper into your pockets, and that's also true for our vape batteries.
Recommended manufacturers include iJoy, Samsung, LG, and Enercig. The source of supply should also be considered, as counterfeit products from the Far East with poor quality occasionally appear in circulation. Therefore, please always look for reputable sources.
High-drain means that the cells are designed for high discharge currents. They are chemically significantly more stable, but generally also have less capacity in favor of their resilience. A standard 18650 cell should have a capacity between 2000 and 3500 mAh. Utopian values ​​of 4000 mAh or more are physically impossible or only partially possible in this range, which suggests a fake product.
If a battery cell is operated above the manufacturer's approved load, the battery chemistry risks becoming unstable, which can lead to outgassing and, in the worst case, fatal consequences and serious damage to your devices, including fire or injuries.

Cells with a continuous load of <20A are recommended.