I just found this thread, and it’s great! Thanks for the detailed runtime tests…
I used to carry a Quark AA Tactical (XP-G high-CRI) and a Quark X low-voltage head on a 2x123 body (17650-powered).
Thanks to this review i just switched the heads. I could have done the runtime-tests for myself, but i didn’t get around to it yet. Thanks!
There’s something interesting about the runtimes when combined with the tailcap current measurements:
The 14500 has a stated capacity of 900mAh.
On Max it draws 1.2A and lasts for 1 hour => about 1100mAh (ok, it will probably regulate down)
On Low its 17.8mA for 49.5 hours => about 880mAh.
I always thought that Trustfire/Ultrafire etc. overstate their capacity quite a bit, so the Ultrafire 900mAh would
be roughly equivalent with an AW 750mAh.
But according to those measurements the capacity seems to be correct.
(i measured the currents on my ultrafire 900mAh and they were the same as given by kreisler, plus/minus a few percent)
Well the current may not be constant over a complete runtime, but i’d rather expect the current to go up than down, as the Quark has a buck/boost-driver.