I have a problem. I laid in a stock of Titanium CR123A batteries (about 160 of them) for the purpose of long term storage, about three years ago. Last week, I got to thinking about it and decided I better try them out to see if they had lost any significant capacity. I broke open a plastic pack of four and installed two of them in my Surefire G2. Nothing... Dead... Ohh, I must have stumbled onto a bad battery I thought, so I installed another two... Ohhhh Noooo .... same thing... Maybe my flashlight has a bad bulb or other problem, So I put the Surefire batteries back in. Blazing light erupts..... This is not good. I tried another two packs of Titaniums and they are all dead. These batteries have been stored in my dresser drawer at room temp for only three years. I thought these batteries were supposed to have a shelf life of 10 years. Looks like I'm out $130. If you have Titanium batteries in storage, check them out. You may be in for a rude surprise.