The popular Samsung Galaxy Note 7 smartphone was recalled late last year after dozens of users’ phones burst into flames. But while that smartphone was particularly prone to fires because of design and manufacturing defects, any smartphone that contains a lithium ion battery could overheat and catch fire—and virtually all smartphones contain this type of battery. There have been several reported cases of iPhones catching fire, for example.

And it isn’t just smartphones that are at risk—lithium ion batteries have become extremely common and are used in everything from laptop computers and tablets to cameras and headphones.

Lithium ion batteries are statistically quite safe, and fires are rare—but they store a large amount of energy in a very small space, so the danger is real. How you use and recharge devices that contain lithium ion batteries could have a significant impact on the fire risk…

Do not rest a device with a lithium ion battery on a bed, couch, pillow or other textile as it charges. These surfaces tend to reduce the device’s ability to dissipate heat. Also, if the battery overheats, such things could catch fire.

If you need to replace a lithium ion battery or its charging cord, purchase the same brand battery or cord designed to be used with the device. Batteries or chargers made by third-party companies might not work as well with your device.

Don’t leave devices that contain lithium ion batteries in direct sunlight or in parked cars on hot days if it can be avoided. This can contribute to battery overheating.

If you notice an odd odor coming from the device and/or it feels unusually hot to the touch, report it to the manufacturer—or your cellular service provider if it’s a phone—and ask for guidance before using or charging the device again.

If you see smoke or flames coming from the device, submerge it in water if you can do so without burning yourself. If you can’t safely move it, call 911. Important: To eliminate the possibility of electric shock from household current if a device is charging, unplug it before submerging it.

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