Back to 20s 18X Flameless Yellow Blink Tealight LED Candle w/ Remote Control Any wireless devices consume little bit power even when they are sleeping and waiting for the remote signal. The button battery inside each candle can only last around 3 days even it is turned off by remote. Hence candles are good for parties and service where it create dramatic on and off effect controlled by remote. If you like to use them again in long time, please do put switch to off MANUALLY to shut off battery completely. Our store supply replacement batteries at very low cost, you may purchase backup batteries from us. Safe for children, pets, at Christmas, Party and Church. Battery life lasts up to 40 hours. Button batteries can be easily replaced w/o tools Size: Diameter :4cm Height :4.5cm