Thanks guys, ran by Wally world and got a Coleman 2AA led to get me through tonight. Really impressed with how bright it is. It wont do other things as good as the 4D Maglight though. Alas,I think they may be going the way of the revolver. I didnt think about sending it back, might think about that, although I dont know if its worth the trouble. I've had it for 10 years, BTW, they were Duracell batteries. Issued streamlight aint much.