Help & Guidance — Purple Haze MK
Can Vapes Explode?
Yes, vapes can explode but it is extremely rare and almost always the result of preventable user error or low-quality devices. Here is what causes it, the warning signs to watch for and how to keep your device safe.
Vapes can explode but the risk is exceptionally low with reputable, certified devices used correctly. The estimated probability of a lithium-ion vape battery exploding is roughly 1 in 1 million. Almost all incidents are caused by battery damage, overcharging with incompatible chargers, exposure to extreme heat or the use of cheap counterfeit devices that do not meet UK safety standards. With a quality device and basic safe practices, the risk is negligible.
Why Can Vapes Explode?
Vape devices use lithium-ion batteries, the same technology found in smartphones, laptops and power banks. These batteries store a significant amount of energy in a compact space. Under normal use conditions they are stable and safe. However, if a lithium-ion battery is damaged, overcharged, short-circuited or exposed to extreme heat, it can enter a state called thermal runaway. In thermal runaway, the battery overheats uncontrollably, generating gas pressure that can cause swelling, venting of hot gas or in extreme cases a fire or explosion.
A 2023 study found that a deliberately damaged disposable vape battery released heavy smoke, reached temperatures approaching 500°C and heated its outer casing to 270°C. This level of heat can cause serious burns and easily ignite nearby materials, which is why battery care and device quality are so important.
Estimated probability of a lithium-ion vape battery explosion with a quality device
Of US vape fire incidents that occurred in users' pockets according to a FEMA report
Temperature a damaged disposable vape battery reached in a 2023 safety study
What Causes Vapes to Explode?
Using incompatible chargers
Charging with a fast charger or a charger not designed for your device can push too much current into the battery, causing overheating and potential thermal runaway.
Leaving device charging overnight
Reputable devices have charging circuits that stop current when full, but if this circuit fails, the battery can overcharge and become unstable. Never leave a vape charging unattended for long periods.
Physical damage to the battery
A dented, crushed or punctured battery can short-circuit internally. Even a torn battery wrap on an external battery can create a short. Damaged batteries should be replaced immediately.
Exposure to extreme heat
Leaving a vape in a hot car, in direct sunlight or near a heat source raises the battery temperature and can trigger instability. Never store a vape in conditions above roughly 45°C.
Counterfeit or low-quality devices
Cheap or counterfeit vapes often use substandard batteries without proper safety features. These are far more likely to fail catastrophically than devices from reputable brands that meet UK safety certifications.
Carrying loose batteries in a pocket
Carrying spare external batteries loose in a pocket with keys or coins can cause a short circuit. Always use a dedicated battery case for external batteries.
Warning Signs Your Vape Battery May Be Failing
Most battery failures do not happen without warning. Recognising the early signs gives you time to take action safely before a problem develops.
- The battery or device becomes unusually hot during use or charging
- The battery section of the device swells or bulges visibly
- The device makes a hissing sound, which indicates gas venting
- The battery wrap is torn, damaged or showing the metal underneath
- The battery drains significantly faster than it used to
- The device does not charge to full capacity or charges inconsistently
If your device starts hissing, place it immediately on a non-flammable surface such as concrete or a ceramic tile, away from people and flammable materials. Do not attempt to hold it or cover it. Move away and call emergency services if a fire starts.
How to Keep Your Vape Safe
The vast majority of vape battery incidents are entirely preventable. Following these basic practices reduces your risk to near zero.
- Always use the charger supplied with your device or one from the same manufacturer
- Do not leave your device charging unattended or overnight
- Unplug the device as soon as it reaches full charge
- Keep your device away from hot cars, direct sunlight and heat sources
- Buy devices only from reputable retailers that stock UK-certified products
- Replace any battery with visible physical damage immediately
- Store spare external batteries in a dedicated hard battery case
At Purple Haze MK in Milton Keynes, we only stock devices from established brands that meet UK safety standards. Our team can advise on the safest options for your needs.
The shape of some vape pens can make battery failures more dangerous than similar failures in phones or laptops. When an internal battery fails in a cylindrical tube, the force can be directional, which is why a US Fire Administration report described some devices as behaving like flaming rockets when a battery fails. This underlines the importance of buying quality devices from reputable sources.
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Help & Guidance Centre
This article is part of the Purple Haze MK Help and Guidance Centre, our resource covering vaping safety, regulations and product guidance. Browse all topics in the Help and Guidance Centre for practical, up-to-date information.
For more on vaping safety and device care, visit the Purple Haze MK Help and Guidance Centre.
Frequently Asked Questions
Can disposable vapes explode?
Disposable vapes carry a lower inherent risk than devices with removable batteries because the sealed battery cannot be mishandled in the same way. However, they should still be kept out of extreme heat and never punctured or crushed. Cheap counterfeit disposables with substandard batteries present a higher risk than products from established brands.
What should I do if my vape starts hissing?
Immediately place the device on a non-flammable surface away from people and flammable materials. Do not hold it or attempt to cover it. Move away from the device and if it catches fire, call emergency services. Do not attempt to put it in water as this can react dangerously with lithium batteries.
Is it safe to charge a vape overnight?
It is not recommended. Most reputable devices have built-in charging circuits that stop current when the battery is full, but if this circuit fails, the battery can overcharge and become unstable. Charging during the day when you can monitor the device is the safer practice.
Can a vape explode in my pocket?
Yes, this is one of the more common scenarios in documented incidents, particularly with external batteries that come into contact with metal objects like keys or coins causing a short circuit. A US FEMA report found that 31% of e-cigarette fire incidents occurred in users' pockets. Always use a battery case for external batteries and never carry a damaged device.
Related Articles
For more on vaping safety and guidance, visit the Purple Haze MK Help and Guidance Centre.
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