LITHIUM-ION batteries power our lives. They’re in cellphones, laptops and more. But reports of overheating and fires have raised safety concerns. What to know:

• Fires are rare. They occur about once for every 10 million batteries, says the Fire Protection Research Foundation.

• Don’t be cheap. Always buy batteries and devices that are certified and have the UL Solutions mark or that of another respected lab.

• Use the right charger. A charging cable that’s not recommended for a device could overheat the battery. The Occupational Safety and Health Administration also advises being wary of so-called ultrafast chargers.

• Charge smart. It’s OK to charge your smartphone on your nightstand, but under your pillow? That’s a bad idea, says the National Fire Protection Association. Also, keep your devices out of direct sunlight, don’t leave them in a hot vehicle and avoid charging them in high heat. —Chris Morris