Specification:
※Model Name: SP31
※Use CREE XPL2-V6 3D LED with a lifespan of 100,000 hours.
※ Correlated Color Temperature Range(CCT Range): 4700K-5000K
※ Working Voltage: 2.8-8.4V
※ Battery Supported: 1pcs 18650 Battery or 2pcs CR123A Lithium batteries
※ Dimension: 130.8mm(length)× 22.6mm(diameter) × 24mm(head)
※ Net Weight: 77.6 gram (no batteries included)
※ Memory on: remember a mode used last time
※ Made of durable 6061 aircraft-grade aluminum by CNC machines
※ Mirror reflective cup
※Low Voltage signals: lower than 3V, one mode blinks 3 times and get back to normal; low than 2.8V, one mode blinks 2 times per second and turn off 1minute later
※ Constant current, No Flash, NO PWM dimmer, Highlight
※ Low Voltage Protection, adjust modes automatically when battery capacity is low in order to protect battery from over-discharge
※ Reverse polarity protection, to protect from improper battery installation
※ Toughened glass len with anti-reflective AR coating, anti-crash wearable
※ The waterproof level is IPX-8, it can be used in underwater 2 meters for 30 minutes. And it is used in rainstorm.
※ Color: Black
NikolaS,
Thanks for sharing this with us, sure appreciate the hard work put into it.
These seem to manufacture for Thorfire and others, according to their Ali-Express Store.
Waiting for some AA Sofirn lights I ordered and looking forward to receiving them.
Cheers,
S-L 
Thanks for the review!