Can Power Banks Be Left in the Car?
3 Answers
Power banks should not be left in the car for extended periods. Here are the reasons why power banks should not be stored in vehicles: Battery: Power banks typically use lithium-ion batteries, which have relatively unstable chemical properties. Whether due to thermal expansion and contraction, self-discharge of battery cells, or impacts and drops, there is always a chance of issues arising at any time—though the probability is low, it's not worth the risk. High interior temperatures: Under direct sunlight, temperatures inside a closed vehicle can exceed 80°C, making battery explosions more likely in high heat. Health hazards: Prolonged storage of lithium-ion batteries can negatively impact human health.
As a seasoned driver with years of experience, I often get asked whether power banks can be left in the car. From personal experience, during summer, the temperature inside a car can soar above 60°C, causing lithium batteries in power banks to overheat and expand, which in severe cases may lead to fire or explosion. The same goes for winter—extreme cold can damage the battery and reduce its capacity. It’s best to avoid leaving them in the car for extended periods, especially near the dashboard or windshield where they’re exposed to direct sunlight. If you must carry one for short trips, choose a shaded spot under the seat or isolate it in the trunk. Similarly, this serves as a reminder that other electronics like phones and laptops are also sensitive to heat and cold. Storing them safely can prevent unexpected hazards and unnecessary expenses.
As an ordinary person who loves road trips, I always keep a power bank in my car for emergencies. But after one bad experience, I've become much more cautious: during a scorching summer day, the power bank overheated and deformed, nearly causing a safety hazard. Now I only place it in the car for short periods when the temperature is stable, such as when parked in a garage or under a shade, and never leave it exposed to direct sunlight. The related topic is that items in the car are easily affected by environmental conditions, and power banks tend to degrade much faster. My suggestion is to carry an insulated bag or store it in the front passenger storage compartment away from heat sources, while also developing the habit of taking it home promptly after use. This way, it's both convenient and reassuring, without affecting the joy of the journey.
