Using these LED tealight candles is super easy. First, make sure the candles come with the 3x AG10 Button Cell Batteries already installed. If not, simply insert them. To turn on the candle, find the on/off switch at the bottom and flip it. To turn it off, just flip the switch back. When the light starts to dim after about 60 hours, it's time to replace the batteries. It's a simple process, just open the battery compartment and put in new ones. Keep the candles away from water as they are made of plastic and can get damaged. When not in use, store them in a dry and cool place. With proper care, these candles will provide you with long - lasting and beautiful flameless lighting.