Since I can't really find a proper review on the M170, I decided to do one on my baby that I got today.
After receiving a defective light from FastTech,
I ordered the same light from CNQG/FancyFlashlights while the exchange was happening.
Roche M170
The Batman of Flashlights.
Summary:
Battery: | 2~4 x 18650 (<~67mm only when stock) |
Switch: | Electronic Rubber Side Switch |
Modes: | A lot. I'm really confused. Output range: 5-100% Quick set 40% mid-mode. |
LED Type: | 3 x XM-L T6 3C (NW) |
Lens: | Big. Glass. Doesn't seem to be treated in any way. |
Tailstands: | Yes. |
Accesories: | Spare O-rings. |
From: FastTech | USD$86.67 -5% = USD$82.34. Free Shipping. |
From: FancyFlashlights | USD$93. Free Shipping |
Date Ordered [FastTech]: | 31 January 2013. Left Hong Kong on the 13th Feb. Arrived in metro Australian address on the 18 Feb. |
Date Ordered [FancyFlashlights]: | 19 Feb 2013. Left Singapore on the 21st Feb. Arrived in metro Australian address on the 5 March. |
Pros:
- Great UI. (Just need to figure it out. :P)
- No/Undetectable PWM on any continous mode.
- Big, deep reflectors.
- HA-III treating.
- IPX-8 Waterproof
- Thick positive-pole brass ring.
- Side switch
- Stepless Ramping
- Tailstands
- Excellent build quality
- Comes with a strong magnet that fits in the base that is able to support it's weight.
- The box tells no lies. There is a flashlight contained within it.
- Locks out.
- Low Voltage Battery Protection @ ~3.3V (esp. since protected batteries generally don't fit.)
Cons:
- Doesn't fit cells greater than 67mm long when stock. (Mod shown later.) This generally means it cannot fit almost any decent capacity protected cell.
- Flat Top batteries turn the light off if the light is bumped moderately.
- Threads aren't square.
- Handle is on the other side of the button. Unless you have a huge forefinger or thumb, changing modes while using the handle can be fidgety with a single hand.
- Quite a heft.
- Smells a little funny.
- Requires high-drain capable batteries for max output. This was a side effect due to a defective driver from my first M170 from FastTech.
- Dry threads.
- No manual!
Other Notes:
- I am seriously confused. There's at LEAST 5 different blinky modes.
Box from CNQG/FF arrived in perfectly bubble wrapped condition.


[bad quality picture removed, it was hurting my eyes]
Good thick lanyard. The handle is light, probably aluminium, metal with the same HA3 treating as the body.













- Press and hold 1-1.5secs to turn on.
- Press and hold again to ramp up. Once max, will blink.
- Press and hold again to ramp down. Once min, will blink. You do NOT have to ramp all the way up to ramp back down.
- Press twice from any level to jump to 40/100% You cannot ramp from this level.
- Press twice from mid to jump to strobe modes.
- Press thrice from mid to jump to SOS
- Press once from any constant mode to turn off. Memory is ENABLED until locked out for quite a while.
- I can't seem to jump to 40% mid. Either that or I can't seem to ramp up past 40%.





- High (100%) - 102mins
- @0mins - 4.18V
- @30mins - 3.86V
- @60mins - 3.55V
- @90mins - 3.38V
- @102mins - 3.20V First ramp down then back up.
- Mid (40%) - 3hrs 53mins
- @90mins - 3.86V
- @120mins - 3.70V
- @180mins - 3.54V
- @210mins - 3.39V
- @233mins - 3.25V First warning strobe.
- Low (5%) - 39hrs
- @6hrs - 4.01V
- @10hrs - 3.86V
- @20hrs - 3.66V
- @30hrs - 3.48V
- @35hrs - 3.32V
- @39hrs - 3.05V cutoff.
The only numerical rating I'm going to give is a happiness rating. 'Cos there's no other reason to buy flashlights.
Main reasons include that it doesn't even get warm (barely slightly warm to touch.) and this makes me think that I'm not able to get to 100% because my SRK gets blazing hot after 10mins on high.
And the inital mode confusion is pretty heavy.
EDIT: Ok, I do believe there's something wrong. When I turn the light on it just ramps up and down continuously, like it's not getting enough current. When I try to ramp again it ramps up, until it suddenly just turns off. It not my batteries, and it's not the contact either because all of them are draining equally and I'm using 18650As. I thought it happened before because the only unprotected I have are Ultrafires and only they would fit in the stock version, but then I realise it couldn't be them because I use them in my SRK all the time and they high-drain fine. Going to open a ticket with FT. Video link below.