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So wait,.... on these lights the positive end goes TOWARDS the emitter right?
Sorry if I caused confusion- the Olight S1R Baton takes the positive towards the tailcap, so I inadvertently inserted my 18650 into the D4VN with + terminal at the tailcap, causing a short circuit that almost led to a catastrophic event. I was sharing this story, as I usually am smarter than the equipment I work with....illustrating that it is always wise to never let fatigue, complacency or both cause an error that could turn an awesome flashlight into a not so cool pipe bomb.....