Assessing E Cigarette Battery and Device Safety E cigarettes or vapes are sold with either single use batteries or lithium ion rechargeable batteries. When vapes get crushed in general waste or mixed recycling, the batteries can spark. That spark becomes a fire. Flavoring Ingredient in E Cigarettes Exceeds Safety Levels Vape Safe: Prevent E Cigarette Fires! Did you know that e cigarette batteries can overheat and cause fires if not handled properly? Stay safe with these tips: Use the right charger