I buyed the Trustfire Alpha C1 Q4-WC bin 2 weeks ago.
It's 3.0v-9v. Tint is excellent, WC bin for sure, and led is perfectly centered in the reflector base.
It says 200 lumens, but i've tested with 2x AW RCR123 750mAh and I've obtained exactly 90 minutes runtime, fully regulated. Excellent runtime.
I think the led is driven about 700mA, not 1000mA.
I would say much more 150-170 lumens, not 200 lumens.
Because if it was driven @1000mA, I'll have only 60 minutes runtime, like the Wolf-Eyes dropin (I have 4 W-E dropins, 2x digital 4 mode 170 lumens, 1x 170 lumens, 1x 130 lumens).
And today, I've received the 5-mode Cree Q4-WC bin.
It says 3.0v-4.2v. I've not done a deepfull test, but it seems fully regulated with one 17670/18650.
Tint is also excellent, WC bin.
The different mode switching is easy, no problem.
The only minus point is that the led is very slightly off-centered, but not a problem at all in real use.
I have access to the led also, the reflector is not glued, wich is a good point for me.
I'll do a runtime test with AW 17670 1600mAh in high and medium mode when I'll have time.
For the price, if it's fully regulated with single 17670/18650, this dropin is EXCELLENT !
Shipping and e-mail responding with no problem.