Using these LED votive candles is a breeze. First, make sure the candles come with the included CR2032 button cell batteries. If you need to replace the batteries in the future, just open the battery compartment at the bottom. To turn the candle on or off, simply use the switch located on the bottom. When it comes to maintenance, since they're not waterproof, keep them away from water to avoid damage. You can gently wipe them with a dry cloth if they get dirty. These candles are reusable, so enjoy using them for many occasions!