They're cheap but rechargable lithium-ion batteries, as well as a blob of electronics to make it heat an element when a button or microphone sensor activates to vape, and a lot of times, also a fancy screen with animations.
Some disposable vapes even include a USB port to recharge that battery, which is why it's certain that they're rechargable.
Some disposable vapes even include a USB port to recharge that battery, which is why it's certain that they're rechargable.