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What Causes Smartphones to Explode and How to Prevent Battery Thermal Runaway

Причини вибухів смартфонів та методи запобігання перегріву акумулятора. Photo: НВ — Техно

Risks of Lithium-Ion Batteries

Lithium-ion batteries powering modern smartphones can trigger dangerous incidents when they overheat, leading to a phenomenon known as thermal runaway. This chain reaction, driven by unstable battery behavior, can cause internal temperatures to soar to roughly 400 degrees Celsius. While these batteries operate best between 0 and 35 degrees Celsius, readings above 60 degrees Celsius already signal potential trouble.

Thermal runaway is a hazardous process where the battery's temperature spirals out of control, fueling further heat buildup. Warning signs include a swollen battery, which indicates gas accumulation inside the casing. Smartphone manufacturers incorporate battery management systems that monitor temperature and voltage in real time to prevent such events. Once the temperature hits a critical threshold, the device automatically shuts down.

Past Incidents and Safety Tips

History has recorded several smartphone fires due to battery defects. One of the most infamous cases involved the Samsung Galaxy Note 7 in 2016, when over 112 units caught fire, sparking widespread debate among users and experts. Although modern smartphones rarely explode, the risk remains.

To reduce overheating and its potential consequences, follow these key recommendations:

  • Avoid leaving your smartphone in direct sunlight or inside closed cars during hot weather.
  • Refrain from using the device while charging, especially if it has already become warm.

By following these simple guidelines, you can significantly lower the risks associated with lithium-ion battery overheating.

The issue of lithium-ion battery overheating remains relevant as smartphone and portable device usage continues to grow. Despite technical improvements and safety systems, it is essential for users to stay aware of potential hazards and adhere to safe usage practices. This awareness helps minimize dangerous situations and protects users from injury or property damage.

In light of the potential hazards associated with lithium-ion batteries, it's crucial to stay informed about the critical signs of battery swelling. Recognizing these warning signs can help you take timely action to avoid serious incidents and ensure your device remains safe for everyday use.