My 4Sevens Titanium Q Mini 123 does not work. No light produced with a known good cell. Light is produced when a P60 lamp assembly is held on top of the body (battery tube, part of flashlight with hole for attaching light to keychain, part with spring in the bottom of it) to form circuit the same way the head would when screwed down onto body. Flashlight worked one day ago, did not work tonight. Using an amp meter to complete the circuit between negative terminal of CR123 and grounding ring of contact board reads 0 amps on highest sensitivity setting. Part of me wants to try to fix it myself (and swap in a 219B while the head is open) but the lack of money, desire to not lose warranty yet, and multimode boost drivers with decent mode selection discourages that.
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