I have the light above and so far really like it but it seems a little unreliable. What I mean is that when I do not use thee light for some hours the light will not turn on and I have to unscrew the tail cap some what and then it will turn on and some times the turbo mode, which is set to the loose setting, will not turn on. I am using regular duracell alkalines so that might be my problem but I don't know. I am going to get some eneloop rechargables but until then I am stuck with the alkalines.