Never mind the potential long-term health effects. Dozens of smokers have filed lawsuits against e-cigarette companies with far more immediate complaints: Their devices are exploding. E-cigarettes run on lithium ion batteries, like hoverboards, which are banned by most airlines for their tendency to catch fire. These unexpected detonations have had serious consequences for some smokers, including amputated fingers and reconstructive facial surgery. As the FDA begins regulating e-cigarettes as tobacco products, manufacturers must now work on more than one front to make these alternatives safer.