Using these candles is a breeze. Just turn the on/off switch at the bottom to light them up. The warm white light will give your space a cozy feel. When the batteries run out, which should be after about 50 hours of use, you can easily replace them with new CR2032 button cell batteries. Make sure to keep the candles away from water since they're not waterproof. If they get dirty, you can gently wipe them with a dry cloth. Store them in a cool, dry place when not in use to keep them in good condition.