I have a DBS VII WITH 3SD pill. It has started playing up. For intance when I turn it on it will go on for a couple of seconds and then switch off for no apparent reason. Somtimes it will not switch on. Also the ability to change levels with the clicky is variable as well. Sometimes I can do it other times I can't. Does not seem to a battery or connection issue? anyone got any ideas? I am running 18650 rechargeables in it. I have not used the torch very much. It is stock-standard, I have not yet tried to replace anything.