1. Sure and smokeless: compared to traditional candles, LED candles with pilas without flame have no open flame, smoke, pollution and low temperature. There is no need to worry about fire security or the dangers of burns. The light is soft and easy to use. : Tea lights without flame can work continuously up to 100 hours. The first 48 hours are relatively stable and then the light will gradually attenuate. If the battery is not used for a long time, it may not generate electricity. After replacing the battery of the same type, it can work normally.