Using these LED tealight candles is a breeze. First, locate the on/off switch at the bottom of the candle and turn it on to enjoy the warm white glow. The set comes with 12 candles, so you can use them all at once for a grand display or save some for later. The battery, a CR2032 Lithium 3 - V, is already included. When the light starts to dim after about 60 hours of use, simply replace the battery to keep the candles shining. Since these candles are not waterproof, make sure to keep them away from water or any wet areas. For maintenance, you can gently wipe the plastic body with a dry cloth to keep the glitter looking its best. Enjoy creating a cozy and beautiful atmosphere with these flameless candles!