Will a Power Bank Explode If Left in a Hot Car?
4 Answers
Power banks can explode if left in a hot car. The following situations may cause a power bank to explode: 1. Circuit Short Circuit: If the internal charging and discharging circuit of the power bank short-circuits, the battery may overheat and explode. 2. Battery Explosion: Under extreme conditions such as high temperatures, punctures, or severe impacts, the battery may explode. 3. Poor-Quality Batteries: Using recycled or low-quality batteries can be dangerous. Many unscrupulous manufacturers recycle old 18650 battery cells and reassemble them into power banks. Such poor-quality power banks not only fail to guarantee charging efficiency but may also lead to fires, explosions, and other serious consequences.
I've encountered similar situations before and know that keeping power banks in cars is indeed dangerous. Lithium batteries experience increased internal pressure under high temperatures, which can lead to thermal runaway causing explosions or fires. Car interiors can soar above 60°C in summer, especially when parked in sunlight where windshields act like magnifying glasses absorbing heat. If you leave power banks on the dashboard or seats, the heat accelerates chemical changes, significantly increasing the risk of battery swelling and rupture. There have been actual incidents reported by media where cars were destroyed by fires. For safety, don't leave them in vehicles for extended periods, particularly in hot weather - it's better to bring them indoors or store them in the insulated trunk area. Develop the habit of checking every time you exit the car to minimize hazards and protect both yourself and your vehicle.
From a safety perspective, I strongly oppose leaving power banks in hot cars. High temperatures can deteriorate battery materials, causing short circuits or explosions, which may instantly ignite and burn items inside the car, harm people, or cause fires. Imagine parking under the scorching sun for several hours—temperatures rise explosively, posing enormous risks. To prevent this, if you feel the power bank is hot to the touch when entering the car, remove it immediately. In summer, use the air conditioning more to cool the car or switch to a car charger instead. Additionally, regularly check the health status of your power bank, as older products are more prone to failure. Educate your family about this—safety first—don’t risk major losses for minor gains.
I've experienced a power bank overheating in my car and now I'd never take the risk. One scorching day, I forgot to take it out and the casing warped and started smoking – I panicked and threw it away immediately. Now I store it in a cool spot at home and only buy high-quality explosion-proof brands. In the car, I only keep essential tools, bringing the power bank along only when needed. Simply put, heat accelerates wear, shortens lifespan and poses dangers. Developing good storage habits ensures worry-free travels.
