I have read of others having their pb superflash turbo turn off by itself. Your best bet is to contact planetbike and see if they will help you out. I have heard that they have good customer service, but haven't had a need to test it out yet. I have two original pb superflash lights that never had a problem. If you end up having to get a new light I would look into the cygolite hotshot which is a lot brighter than your turbo and similar priced with usb recharging. I now use a hotshot and a superflash combo and it works very well. The hotshot is one of the most intense lights out there when you are driving up behind it and it is cheap too.