Hi all. I recently took delivery of a XT11. Have been extremely happy with it, up until last night. Was showing it to a workmate, went from high to strobe and back to high. It suddenly started blinking while on high, then within a couple minutes pressing buttons it died completely. I would be lucky to have gotten half an hour use out of it. The cr123 batteries are still showing 2.7 volts on a multi meter. Is this just a failed cell scenario or something more sinister. I realise trying new batteries would be the obvious thing to do, but I won't have access to any for a few days. Any help greatly appreciated.