I can only say: IMMEDIATELY !!! the candles do not just look real, they are real wax candles! the LED is noticed only when one looks closely. I use the candles on the doorstep. Super I find the timer function. I put the candles so every day of about 17.30 clock for a 4h ... and the batteries are still the first. all through Advent !! The real candles warenn but at least to replace at least every 3-4 days. smooth recommendation!