I bought this click in 2013 and the battery is still going, its only just started to lose the brightness of the light and the loudness of the beep. Its just what I wanted as I have a phobia of over -sleeping and am constantly checking the time in the night...now I just lift my head up, no fumbling in the dark for switches. I have it on the first setting of the night -lit screen, which is more than adequate. Its really small and compact so doesn't take up much room and it light enough to pack when travelling. A great investment, really glad I bought it!