Olight M2R NW+CW review with measurements (18650, XHP35, USB charging)


Dec 22, 2015
Disclaimer: The Olight M2R Warrior was provided for testing by the manufacturer free of charge


The M2R is the latest addition to the Warrior series of tactical lights from Olight. The M equals Military/Tactical, the 2 in Olight's nomenclature means it uses an 18650 battery while the R tells us it has integrated charging. In the M2R there's a novel metal switch slash charging system for the included USB charger.

Manufacturer's specifications
Battery: standard 18650 (included, flat tops and buttons tops are fine), 2x CR123A
LED: Cree XHP35 HD in neutral or cool white
Strobe: 9Hz
Waterproof: IPX8
Mode memory: yes, except turbo and strobe
Low voltage protection: side switch led indicator when battery voltage low, automatic power cutoff at critical levels
Thermal regulation: yes, reduces output to prevent overheating

Output specs
Maximum output: 1000/1500 lumens for 3 minutes + 700 lumens for 1 h 50 min
Other output levels: 700/250/60/15/1 lumens
Light intensity: 10880 candela
Beam distance: 208 m


Cool and neutral white versions have quite a big range. There's bound to be some lottery.

Dimensions and weight
Length: 130mm
Head width: 25.4mm
Handle width: 24.4mm
Weight: 149g

Box and contents





Bundled in the box with the light:
Olight ORB-186S35 3500mAh 18650 battery
Magnetic USB charger
User manual

No o-rings in the box.

Physical appearance


The neutral and cool white version can be distinguished from each other by the serial number. NH... = neutral, H... = cool.




Double walls carry both terminals to the tailcap, which enables charging any 18650 in the light. Spring on both ends so recoil should be no problem. Also enables flat tops as well as button tops to be used.


The bezel and reflector are easily removed thanks to the crenelated bezel.


Olight S2R, Olight S30R III, Convoy S2+, Olight M2R, Thrunite TC12 V2.

User interface

The light is operated via two electronic switches, one on the side, one in the tailcap. They perform different functions. The tailcap switch has two stages and two working modes: standard and enhanced tactical. You switch between these modes by pushing the tailcap switch all the way in and clicking the side switch.

The side switch is quite stiff. The little nipple on it is supposed to help finding it in the dark, but I still find it quite difficult. With gloves on the small size and stiffness may hinder the control a bit too much. At least it doesn't activate accidentally. The tailcap switch also requires quite a bit of force.

Electronic and physical lockout are both possible. Electronic lockout also affects the tailcap switch.

In standard:
Half press: momentary 1000 lumen turbo
Full press: constant 1000 lumen turbo (light stays on when the switch is released), another click of either switch will turn the light off

In enhanced tactical:
Half press: momentary 1500 lumen turbo
Full press: momentary 9 hertz strobe

Operation is as follows
From off:
Single click turns the light on on previously used mode (except turbo and strobe)
Double click turns the light on on high (needs a second double click for turbo even if the memorized mode was high)
Triple (or more) click turns the light on on strobe
Press and hold to access moonlight
Keep pressing for electornic lockout, repeat to unlock (side switch backlight glows red when pressed if lockout is on)

From on:
Single click turns the light off
Long press and hold cycles low, mid2, mid1, high
Double click activates high, another double click activates turbo (1000 lumens in standard mode, 1500 lumens in enhanced tactical)
Triple click for strobe

If the light has first been turned on using the side switch, the tailcap switch works normally, but the light turns off when it is released. This also makes the full press turbo act as a momentary. I would like an option to be able to go back to the previously used mode when the tailcap switch is realeased and for a full click to leave the turbo on.

Since the light uses an electronic switch, there's some standby drain, but not much.

Parasitic standby drain: 64µA

Battery and charging


The M2R uses the familiar magnetic USB charger, but unlike the R50 Seeker it doesn't come with a USB power supply.

Olight has gotten some critique on the exposed contacts on their USB rechargeable lights, which could light up steel wool for example. This has been fixed in the latest version of the H2R. The M2R is also safe and doesn't allow current to flow from the tailcap contacs. What makes the M2R unique in Olight's lineup is the fact that you can use and charge any 18650 in the light. The flashlight body has double walls for the positive and negative terminals. The battery is inserted with the positive end towards the tail.

The USB charger works well, but is very slow. It takes over 7 hours to fully charge a completely depleted 3500mAh battery. The charging circuit starts to limit current very early. The maximum current required from a USB port is 0.8A. I measured 4.21 volts from the battery after charging.



Olight ORB-186S35 Battery measurements

The bundled battery is a high quality LG MJ1 3500mAh with a protection circuit and Olight wrapper added.


Capacity: 3359mAh (measured at 6W discharge down to LVP)
Energy: 12Wh (@6W)
Maximum current (OCP): 10.3A
Minimum voltage (LVP): 2.44V
Internal resistance (Ri): 59mOhm (measured at 8A DC)


Discharge curve at 6W.















Beam, tint and color rendering

Unlike the prototype and the images on Olight's website, the reflector is orange peel, not smooth. This has probably made the beam more pleasant, but lose a bit of throw.



Tint in different brightness modes. As is usually the case there's some shift when the current is increased, because PWM is not used. On moonlight and low the tint is visibly greenish.



Tint in different parts of the beam. Shifts to cool towards the edge of the spill. Hotspot is very neutral on both lights with a slightly greenish corona and cooler spill. In practice the beam is good and you're hard pressed to see the tint shift in actual use.

Spectral data and color rendering

For spectral information and CRI calculations I use an X-rite i1Pro spectrophotometer with HCFR, Babelcolor CT&A and ArgyllCMS spotread for the graphs and data. For runtime tests I use spotread with a custom script and an i1Display Pro because it doesn’t require calibration every 30 minutes like the i1Pro.

Explanation of abbreviations (click link to read more)

CCT = correlated color temperature, higher temperature means cooler (bluish)
CRI (Ra) = color rendering index consisting of 8 different colors (R1-R8), max value 100
CRI (R9) = color rendering index with deep red, usually difficult for led based light sources, max value 100
TLCI = television lighting consistency index, max value 100
CQS (Qa) = Proposed replacement for CRI, RMS average of 15 color samples
CRI2012 (Ra,2012) = Another proposed replacement for CRI, consists of 17 color samples
MCRI = Color rendering index based on the memory of colors or 9 familiar objects
NEW Read more about the IES TM-30-15 method here (link is external)
TM-30 = The newest color rendering method using 99 samples. Preferred for comparing LEDs.
TM-30 (Rf) = Accuracy of colors, fidelity index. Replaces CRI(Ra).
TM-30 (Rg) = Gamut of colors, saturation index. Higher number means more saturated colors.
Tint dev. (“Duv” in the CTA screenshots) is the tint’s distance to the black body radiator line in the CIE graphs. The higher the number, the greener the tint. 0,0000 means absolutely neutral white and negative numbers mean rosy/magenta tint. Anything over 0,0100 can be described as visibly green.

If you have an hour to spare, I recommend watching this presentation on IES TM-30-15 which also shines light into color rendering in general.


CRI data for the neutral white M2R


CRI data for the cool white M2R

Output and runtimes


Add 3% to maximum output and lumen hours for the CW model.

My test samples had no problem hitting the advertised output. The difference is not large, which was to be expected because of the small difference in color temperature. There's little to gain from using a high current battery. I only got a couple percent more instant lumens from a VTC5A, but it will drop down to similar levels after 3 minutes.

All the output and runtime tests were performed without external cooling. Cooling doesn't improve output, which gradually decreases during the first three minutes. Ambient temperature was 24-25°C.








The surface temperature stays under 50°C on the highest mode and will not burn you in normal use - unless you shut it off and reactivate turbo repeatedly.


No PWM or flicker was evident on any mode. I only measured very minute high frequency ripple on modes other than turbo, which wasn't visible even on camera. Nothing to worry about.




The long awaited M2R delivers in many ways although I would have liked to see some more flexibility with the tail switch. I like an instant access to turbo on a light, but would like an extra mode where the light would return to a previously used brightness level after release and not shut down.

Big thanks to Olight for making the light compatible with all 18650 batteries, including the charging. The tailcap is also safe and will not ignite even steel wool. I only got 3mA out from the tailcap contacts, which is negligible.

The side switch is quite hard to find in the dark and is pretty stiff. Not exactly easy to use with gloves. Sudden need for high output is available at any time from the tailcap with a half press. I would've liked to get the maximum output in standard mode too. But if you don't need the constant turbo from the tailcap, just use the enhanced tactical mode and the turbo will be 1500 lumens even when activated with the side switch.

Olight should select more tightly binned emitters for the lights. Many people are okay with 5000K but find 4000K too warm or like 5500K but dislike 7000K. My neutral and cool white happened to be quite close to each other (4900K and 5400K). Both of them had nice and neutral tint in the hotspot on higher outputs but a bit greenish on low, which is typical for Cree emitters run on constant current (no PWM).

+ Charging system works on all 18650s
+ Handily meets output specs
+ A real sub lumen moonlight mode
+ Neutral hot spot with not too bad of a tint shift for Cree
+ Build quality is top notch
+ Simple and familiar user interface with a dash of tailcap tacticalness
+ No PWM or any sort of flickering
- No backlight on the side switch
- Charging is slow (~7 hours)
- Timed stepdown instead of true thermal control
- Greenish tint on the lower modes
- The range of cool and neutral white color temperature is large
- Maximum turbo output is limited to the enhanced tactical mode
Last edited:


Oct 15, 2013
Thanks maukka, awesome review as always:twothumbs

That 1500K CCT variation on the cool white flavour though, are they buying 7 step MadAdam ellipse LEDs?


Flashlight Enthusiast
Jan 5, 2009
Stunning review :twothumbs
seems a very well thought out light, too match real tactical with edc in one. Usually impossible but it looks like they may have done it.
I personally would like more throw , a bigger head like m23 or a high emitter ?


Dec 22, 2015
I find it a bit disappointing that the strobe is not full 1500 lumens but about on par with high. Below is full turbo first and then a very short burst of turbo from the tailswitch and then a full press of strobe.



Dec 22, 2015
Updated the M2R with a XHP35 HI 5000K CRI80 from kaidomain. Well, it was listed as CRI80, but turned out to be CRI70, boo. So buyer beware.

Also measured the beam with the new servo platform at 1 degree steps. These were all done with the Mid1 mode.

Here's the M2R neutral white with the stock XHP35 HD.


M2R cool white with the shaved dome XHP35 HD


M2R with the factory domeless XHP35 HI 5000K


As can be seen, the tint shift is considerably smaller. Especially the green shift on the corona is reduced. Also the cool white on the spill edge is much better in control.

Here's a quad 219B sw40 for comparison. In practice, you can't even really see the shift since it's linear and tracks the black body line nicely.


Here's the tint shift as deltaxy graphed versus beam angle


This one illustrates clearly how much less the tint varies in different areas of the beam. Since the S41S is practically perfect in real life, its linear curve reveals that it's the sudden big changes that matters, not the maximum shift.


Flashlight Enthusiast
Jan 3, 2015
Northwestern Ontario, Canada
Nice work. Thanks for the added info Maukka:thumbsup:

The HI emitters do seem to help a lot with lights that use a reflector and a clear lens when it comes to tint deviation from hotspot to spill. With an optic or frosted lens light it doesn't seem to matter as much as they help blend the deviation.


Flashlight Enthusiast
Sep 16, 2012
I'm super interested in the Olight M2R in general after realizing how many points it hits for me. I love that it has a neutral white version too... But holy cow is that Zebralight SC600w MK3 HI tint good in my opinion based on your images. Much more of a true creamy white neutral in my opinion. Look at that color separation in the brush shots. What are they doing to get that amazing tint? I don't own a light from either brand. If the Olight M2R had that tint it would be at the absolute TOP of my future to-buy list concerning flashlights. Nice review.