Thing is, I’m not looking for a monster. I don’t want another direct-driven battery-burner, I already have that in my DRY’ed 3T6. XM-L2’s, maybe 2 amps per emitter, less if it’s more than 3 emitters., and the sinking to deal with the heat that would generate. That’s all I’m really looking for.
So leave the stock limiting resistors in place. The light has good machining, good reflector, good lens, everything fits properly (unlike a similarly priced fake SRK), and has a nice thick screw-in plate under the LEDs. Replace the puny 3-up MCPCB with 16mm copper, add a short spring under the switch button, and give it a brain transplant (105C flashed with momentary switch firmware) and you just turned a $35 light into a $100 light.
A real SRK or the Fandy UV-S5 are about $50. A quality knockoff like the Securitying, an order of 7135 driver boards, and a donor 105C from DrJones/RMM plus a handful of chips is going to amount to the same total.
So which is the better option? What advantage does the three-toroid driver hold over a 7135-based unit? Is it simply maintenance of a given brightness level until battery exhaustion?
No, the older 3-toroid driver is just needlessly complex. Without a boost driver, and the input voltage so close to the LED's Vf, it doesn't make much difference whether it's a buck driver or linear driver or direct drive with current limiting resistors. The only difference will be losses from driver inefficiency, which will be small even with a 'bad' driver.
Runtime/light output if all drivers are running at the same output current will be about the same. You might could find differences between them on a light meter, but you'd never see it in actual use in either light output or runtime.
The old 3-toroid SRK drivers are available separate from Wallbuys, if for some reason you want one. It'll still have the same non-UI as always.
Can you show some photos of how to do this? I am planning to buy the ebay one and mod it just like you said.
Will cut some custom thicker gauge copper wires out for this badboy and get it working!
I have to admit the color is pretty bad, but if it performs as good as you say it does, then I will buy it.
Damm you!
bought 2 and now gotta get 2 more.
got everyone at the shop hooked now.
checking out a ton of 18650 as I type……
pwm not too offensive.
edit.have 5 of these in our group now.all have xml2 at around 5500k.
nice units all around and are being dropshipped through amazon in ky.
they get here fast in ohio.
that seller has his ducks in a row for sure.
edit again.these do have strobe and sos with long press of button.
not documented on the securitylng site.