Using these LED tealight candles is easy. First, check if the battery (a 1 CR2032 Lithium battery 3-V) is included and installed. If not, insert it carefully. Then, turn on the on/off switch at the bottom to light up the candle. You can place them anywhere you want to create a cozy atmosphere. When the light starts to dim, it's time to replace the battery. Make sure to use the same type of battery for the best performance. Since these candles are not waterproof, keep them away from water to avoid damage. Also, store them in a dry and cool place when not in use.