dszpiroMost likely you & me have the sane issue. The on/off e-switch faulty. I bought 3 units, from the last drop. 2 units. Toby & Gwen from support community not helpful at all for after sales. Not extending any help even though i wanted to buy the spare tail cap (end cap) to replace. Many who bought have encountered this problem. The support community don't try to solve this problem. Yet try to get backer to support the drop. Very un-enthtical bussiness behaviour.