Short answer: Follow the device maker’s storage directions and keep unopened vapes away from direct sunlight, hot cars and extreme cold. There is no universal “safest temperature” that applies to every model. The FDA recommends protecting vape batteries from extreme temperatures.
Choose a suitable storage spot
- Use a dry location away from heaters, windows and direct sun.
- Keep products in their original packaging until use and follow manufacturer instructions.
- Keep nicotine products away from children and pets.
- Check packaging and the device for leaks, swelling or damage before use; do not charge or use a damaged device.
Why a fixed temperature claim is misleading
Battery chemistry, packaging and manufacturer instructions differ among models. The previous version of this article asserted that exactly 15–25°C is always the safest range and claimed an unsupported percentage of devices fail because of storage. Those claims have been removed. Avoid extreme temperatures and use the instructions for the specific product.
Frequently asked questions
Can I keep an unopened vape in my car?
Do not leave it in a hot or very cold vehicle. FDA guidance warns against extreme temperatures.
Should I use a device with a swollen battery?
No. Stop using it and ask your local household hazardous waste program how to handle it safely.
Source: FDA battery safety guidance linked above. Reviewed September 2026.