Hi to all, i received my Utorch SF01 yesterday, and i’m being testing it.
I can confirm that it work with AA, AAA and CR123A. It’s a bit tricky to put in the AAA, you have to center it well to make electric contact but once closed i can shake it hard without any problem( a very stiff spring keep it in place).
The LED seem a cool white Cree XP-G2( in the manual title says CREE XR-G2, gearbest says XR-E, maybe a mix of XR-E with XP-G2 
), I tried to unscrew the head but didn’t managed to, yet!
This flashlight really is a streamlight copy it even has the same TEN-TAP® Programming from streamlight:
three different operating programs:
- high/strobe/low 2) high only 3) low/high
Visually i only see the two differences from the PROTAC 1L-1AA, the knurling in the tail cap and having just 3 instead of 4 fins around the head.
Tail cap currents:
CR123A:
High 0.884 A
Low 0.335 A
AA:
High 1.41 A
Low 0.430 A
Some photos:
Utorch SF01 album