Vapes run on lithium-ion batteries. They're powerful, compact, and generally safe when treated right. But they also have a flip side: if a cell is damaged, overcharged, or shorted, it can overheat and, in rare cases, catch fire. That's why every device you pick should have layers of protection—not just a good coil.

Most first-time buyers worry about flavor or nicotine strength, but battery safety is the one thing you shouldn't compromise on. You might not notice a safe battery when it works, but you'll definitely notice when it fails.