Can Power Banks Explode When Left in Cars During Summer?

[Emilia]

It is highly possible because most power banks contain lithium batteries, which may explode after being exposed to high temperatures inside a car. Additionally, the following items left in a car can also pose safety hazards. Here are more details: Carbonated Drinks: These contain large amounts of carbon dioxide gas. After being shaken during driving and then exposed to high temperatures, they are also likely to explode. Glass Items: Some glass items have a convex lens shape, which can focus sunlight into a single point. The temperature at this focal point can rise sharply, potentially causing items inside the car to catch fire.

[StViolet]

Once I left a power bank in the car during summer, and at noon when the temperature soared, I found its casing had deformed and it was scalding hot to touch. A friend warned that lithium batteries can swell or even spontaneously combust under high heat, which is extremely dangerous. The unstable chemicals inside the battery expand excessively in high temperatures, potentially damaging the device at best or causing fires and explosions at worst—especially in an enclosed car cabin where direct sunlight can push internal temperatures above 70°C. It's advised to always take your power bank with you when leaving the car, avoiding the temptation to lazily stash it in the glovebox or under the seat. Developing this habit can prevent tragedies. Keeping a small portable bag in the car for essentials is both safe and convenient—after all, life and property are no small matters. Since that incident, I’ve never dared to be careless again.

[Lawrence]

As a long-time enthusiast studying electronic products, I'm well aware of the risks of leaving power banks in hot cars. Lithium-ion batteries may experience thermal runaway when temperatures exceed 40°C, causing internal electrolyte decomposition that generates gas, which can lead to explosions due to excessive pressure. This risk is especially amplified during summer when car temperatures rise rapidly, compounded by the fast heat conduction of metal components. I would recommend choosing batteries from reputable brands, as they typically incorporate safety mechanisms like automatic power cutoff, though these shouldn't be solely relied upon. When storing, avoid sun-exposed areas such as dashboards or beneath rear windows - it's best to keep them in shaded bags when transporting. Regularly inspect battery conditions, and immediately discontinue use if swelling or unusual odors are detected. These small details are crucial for everyone's safety.

[VonVivian]

I always remind my kids not to leave power banks in the car when we go out, as it's extremely dangerous in hot weather. In summer, the lack of air circulation causes the car temperature to rise rapidly, which can lead to lithium battery leakage or short-circuit explosions, harming both people and the vehicle. As a parent, I insist on teaching my children good habits: clearing out clutter, including electronic devices, every time they exit the car; keeping an insulated bag in the vehicle for emergencies. This not only prevents explosions but also avoids property damage and accidents, ensuring family safety. Regularly sharing safety tips helps raise awareness of potential hazards—simple actions can prevent major troubles.