Using these battery - operated LED flameless candles is a breeze. First, make sure the 1x CR2032 battery is properly inserted. Then, simply turn the on/off switch at the bottom to light up the candles. They're great for creating a cozy atmosphere at home, or adding a touch of elegance to weddings, churches, restaurants, and events. When it comes to safety, since they're flameless, there's no risk of fire. Just keep them out of reach of small children who might try to put them in their mouths. For maintenance, when the battery runs out, replace it with a new CR2032. You can clean the plastic candles and flames with a soft, dry cloth to keep them looking shiny and new.