Wurkkos

Acebeam X45 review with measurements (4x XHP70, 4x 18650)

maukka

Well-known member
Joined
Dec 22, 2015
Messages
644
Location
Finland
Disclaimer: The Acebeam X45 was provided for testing by the manufacturer at no charge.

With the X65 Acebeam showed that a world class thrower doesn't have to have a pencil beam. The X45 is almost half the weight of the X65 and redefines the compact floody monster series with its 16500 lumens of claimed output. Decent throw comes as a side effect of the massive output.

wLTfKBF.jpg


Features and manufacturer's specifications
Battery: 4x18650, the light comes bundled with four 3100 mAh high drain batteries
LED: 4x Cree XHP70 P2, choice of 5000 K and 6500 K
Waterproof: IPX8, 2 meters
Mode memory: yes (low, mid, high)

Manufacturer's output specs
Maximum output: 16500 lumens
Other output levels: 9000/4000/1500/500/3 lumens
Light intensity: 85200 candela
Beam distance: 583 m

Measured dimensions and weight
Length: 155 mm
Head width: 88.5 mm
Handle width: 50.5 mm
Weight: 523 g for the light and 192 g for the batteries

User interface
From off:
Click side switch to turn on the light on the last mode used (low, mid, high)
Double click for turbo, two additional fast clicks for turbo max (light turns off between clicks)
Triple click for strobe
Long press for firefly mode
Even longer press for lockout mode or unlock, light flashes twice to verify lockout mode

From on:
Click to turn off
Hold switch to advance to the next mode (low-mid-high-low...)
Double click for turbo, two additional fast clicks for turbo max (light turns off between clicks)
Triple click for strobe

The turbo max is not very easy to activate since the timing has to be precise on the second double click. Click once and wait for the light to turn off and then immediately click again. Normal fast double clicking works only for turbo.

Box and contents
BLPkOZs.jpg

There's no check boxes on my review sample. According to other users my sample is likely the cool white version.

Bl5cxOy.jpg


rnbdqUf.jpg


Bundled in the box:
4x 18650 3100 mAh batteries, protected high drain IMR
Lanyard
Holster
2 Spare o-rings
User manual
Warranty card

0SBJ1Jk.jpg


FUcjour.jpg


x5Ln3yr.jpg

There's a thread inside the bezel for accessories such as a diffuser and colored filters.

AA8tWFQ.jpg


Acebeam stayed with the original XHP70 on the X45 even though the new and improved XHP70.2 is already available. No donut holes visible though, but they might have been able to squeeze out a bit more juice at lower temperatures from the new one.

pm2mEc9.gif


T5SxTt4.jpg


E2MzM5c.jpg


Tuj99xz.jpg

The light consists of three removable parts: the head with the LEDs and electronics and the handle in which the battery carrier slides into.

0MKPWgG.jpg


i5WUk8l.jpg

The battery fit is very tight.

Coq5Se9.jpg

The handle doesn't contain any electronics, it's just a dumb (and light) aluminum shell.

Batteries

IvAMCKi.jpg


The bundled 3100 mAh 18650 batteries are very good in their current capability (low internal resistance similar to Sony VTC6). They are quite long and only barely fit to the X45 battery carrier, but the contact is excellent.

The carrier sets the batteries in series so protected batteries are recommended. Flat top batteries can also be used though, thanks to the springs+buttons in the carrier. The battery carriers in the X45 and K60/K70 are interchangeable.

XL4PX4I.jpg


JqOca5L.jpg

The carrier connects to the driver board from either end, it doesn't matter which way it is inserted to the handle. The center pin is positive, the outer ring negative.

QoNM0wA.jpg


Acebeam 3100 mAh 18650 IMR measurements
Length: 69.9 mm
Width: 18.7 mm
Weight: 48 g
Protected: yes
Capacity: 2935-2966 mAh
Energy: 10.559-10.751 Wh
Average voltage: 3.593-3.600 V
Internal resistance: 0.036 ohm
Over current protection: >20 A (my load only goes up to 20 amps)
Low voltage protection: 2.49 V


Capacity was measured at 1 amp down to 2.5 volts after being charged to 4.20 volts at 1 amps.


1cS7nAl.png



Judging from the measurements, I'm assuming the batteries are Sony VTC6 with an added protection circuit and Acebeam wrappers.


Size comparison

The Acebeam X45 isn't a soda can light even though the configuration is similar to other multiemitter lights. It is both longer and wider in the head than the Olight X7 and MecArmy PT60. While the latter ones do fit in your jacket pocket, it's quite a reach with the X45. Even so it is still quite a bit more compact than the single XHP70 Acebeam K60.

9lLjfsJ.jpg


hICuRT1.jpg


rJMSgsR.jpg


kzLDHcN.jpg


Beamshot comparisons

Wide head and shallow reflectors make the X45 very floody. The hotspot is tighter than on the Olight X7 for example, but the spill is also wider. Overall beam tint is similar to the Olight with the green hotspot and cool blue spill. There's just a lot more overall output and double the throw.

vVdp49f.gif

Links to individual images with some extra flashlights:
Acebeam X45
Olight X7
MecArmy PT60
Noctigon Meteor M43
Acebeam EC50 II NW
Nitecore EC4SW (used as the white balance reference for all beamshots)
Acebeam K60 modded with a sliced dome 4500 K CRI90 XHP70

Fxg2Svh.gif

Acebeam X45
Olight X7
MecArmy PT60
Noctigon Meteor M43
Acebeam EC50 II NW
Nitecore EC4SW
Acebeam K60 modded with a sliced dome 4500 K CRI90 XHP70

yzJGA2Q.gif

Acebeam X45
Olight X7
MecArmy PT60
Noctigon Meteor M43
Acebeam EC50 II NW
Acebeam K60 modded with a sliced dome 4500 K CRI90 XHP70

UWr4Yqf.gif

Acebeam X45
Olight X7
MecArmy PT60
Noctigon Meteor M43
Acebeam EC50 II NW
Acebeam K60 modded with a sliced dome 4500 K CRI90 XHP70

Beam, tint and color rendering

Just like in most XHP70 lights going for max output, the beam has a greenish tint in the hotspot and bluish in the spill combined with a low color rendering index. On lower modes the tint moves even more towards green. The emitters used in my sample of the X45 are the greenest I've seen yet. I would have gladly sacrificed some output to get a more neutral tint like in the Acebeam EC50 II NW. This is of course assuming that the emitters in my sample are indeed the 5000 K versions. At least the hotspot measured at 5000 K, but with Cree you never really know what you'll be getting, so your mileage will vary.

d3TthBe.png

Tint in different parts of the beam.

p6yuA1y.png

Tint in different brightness modes. The shift pretty much already reveals that no PWM is used on the higher modes, but since firely suddenly moves backwards, it is a clear indicator of what's happening...

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.


y4LwPSI.png

Color rendering on turbo max.

Bv7XZu3.png

Color rendering comparison.

Runtimes and output
LY0WL3t.png


KoJuZ4K.png


wOtX6HX.png


The X45 absolutely trounces the smaller soda can monsters. When uncooled, it offers on average over 50 % more output than the MecArmy PT60 and Olight X7 during the first 5 minutes. This comes at a price though, since the flashlight gets very hot. I measured the head at 96 celsius and the handle at 73 celsius after 5 minutes. This isn't good for the batteries so I recommend only using the turbo max momentarily and never without supervision.

The second highest turbo mode is closer to other lights in output, except that when sufficiently cooled, the output doesn't step down at all before the batteries are getting low after 30 minutes. Half an hour at 8000 lumens is quite impressive.

On turbo, the temperature climbs up to 65 C in the head and 50 C in the handle after 5 minutes. After the stepdown at 8 minutes the readings are 73 C and 59 C respectively. This is too hot to hold, so the user will probably lower the output on their own before the light decides it's too hot.

Cooling the light after it has already stepped down will not resume original turbo (max) output and requires the user to activate it themselves. On the other hand the turbo max mode works exceptionally well even when the cells are below 50 % charge. I measured only a slight difference in output compared fully charged cells at 50 % charge (14060 vs. 12950 lumens average during 3 minutes).

Fmje2zC.png


cWhJ7u1.png

Turbo max works with lesser batteries too. Even the lowly Panasonic NCR18650B gets it up to 12400 lumens. And since the light doesn't heat up quite so much due to the lower current, the stepdown happens a bit later than on higher current batteries.

Y08Mddb.png


W4pLcaQ.png


Q7JSvdf.png


PWM

No PWM on any mode, but there's very low amplitude 600 Hz pulsing on firefly, that is impossible to see with the naked eye.

Verdict

The Acebeam X45 will be a polarizing light for sure. On the other hand it is the most powerful flashlight I've ever tested, putting into shame other pocket sized monsters (I haven't tested the Imalent DT70), but the light quality leaves a lot to be desired. I wished Acebeam offered the X45 as a more neutral version with passable color rendering and less green tint and shift. I know this is difficult to achieve with the emitter used, but they seemed to do quite well with the EC50 II. I for one would gladly have less output for better tint. As it is, the beam for me is too green in the hotspot and too blue in the spill.

On to the good then. The workmanship is excellent and the output is absolutely ridiculous. Yeah, it is a bit bigger than the soda can lights I've tested previously, but the overall amount of light and throw is in another class. The output stays constantly high on the high mode at over 4000 lumens. The insane mode (turbo max) the X45 doesn't limit the output for you until it's too late. If you feel like your hands are burning, just switch to a lower mode. It is probably intentionally made difficult to access to avoid accidents...

With some emitter mods, the Acebeam X45 will be one helluva thing. For the prize I would have wanted it to cater to the needs of enthusiasts who appreciate tint in addition to power though. I appreciate that Acebeam provided the light with some seriously high quality 18650 batteries that you can utilize in other high output lights as well.

+ Exceptional output for the size
+ Good mix of throw and flood
+ Good regulation on high and turbo
+ Comes with excellent high drain batteries
+ Turbo max mode works well even with almost drained batteries
+ Solid construction
- Strong green tint in the hotspot and blue tint in the spill
- Low color rendering index
- Turbo max mode still difficult to activate
- Thermal regulation doesn't increase output after cooling
- Gets *burning* hot on turbo max unless cooled
- Negative end marked with an orange stripe on the batteries
 
Last edited:

SG Hall

Well-known member
Joined
Sep 17, 2015
Messages
1,097
Location
Sampson Flat, Sth. Aust.
Thanks for a comprehensive review maukka. Exceptional! [emoji4]

This light is a brute for output! Acebeam are kicking some serious goals at the moment. I do agree that the beam quality is disappointing though. The blue in the spill is a turn off. Modder required on this light! [emoji1]
 

richbuff

Well-known member
CPF Supporter
Supporter
Joined
Nov 21, 2014
Messages
2,181
Location
Prescott Az
Thank you for your detailed and valuable review.

My guess is that tint varies with different emitter samples. I am going to guess that your sample has greener emitters than average, but it is just a guess.

There is a lot of excitement about this light in the German forum.

I am waiting for Vinh mod specs compared to the Vinh mod TK75vnQ70, in the throw specs department.

Again, thank you!
 

seery

Well-known member
Joined
Feb 10, 2006
Messages
1,613
Location
USA
Verdict

the light quality leaves a lot to be desired...the beam for me is too green in the hotspot and too blue in the spill.

So far this seems to be the general consensus.

Have one on order, but will most likely cancel it based on what I've been seeing.

It seems every day I love the K60 more and more...

Great review maukka. Thanks for sharing it with us.
 

cclin

Well-known member
Joined
Jul 15, 2016
Messages
107
Thank you for your detailed and valuable review.

My guess is that tint varies with different emitter samples. I am going to guess that your sample has greener emitters than average, but it is just a guess.
MANY of the x45 owners report that x45 has green tint.................
x45-1.jpg

x45.jpg
 

maukka

Well-known member
Joined
Dec 22, 2015
Messages
644
Location
Finland
I am fairly certain that the bundled batteries are Sony VTC6, since the internal resistance, capacity and discharge curves all match those perfectly. The batteries are also a very good match to each other.


1cS7nAl.png
 

Impossible lumens

Well-known member
Joined
Apr 25, 2015
Messages
935
Great review. Thanks for taking the time. The beam does look off in terms of color. Looks like too much green and yellow pea soup. I notice some sellers have it listed as 13,800 lumens and others 16,500. I also notice you're tested results were closer to the 13,800 number. I wonder if there's already supposed to be a "first run" version and a "final run" version. Price seems reasonable but still, better tint would be nice.
 

Zak

Well-known member
Joined
Aug 12, 2016
Messages
256
That's an impressive red/green colorblindness simulator Acebeam built, but I'm pretty sure a Meteor would be more useful. Nice batteries though.
 

maukka

Well-known member
Joined
Dec 22, 2015
Messages
644
Location
Finland
Correction: Not PWM on firefly, just some very mild pulsing at 600 hertz in the output and impossible to see with a naked eye.
 

KG_Tuning

Well-known member
Joined
Sep 1, 2016
Messages
642
Location
Wakefield UK
Impressive but I'm glad I chose the Imalent DT70, fits in my pocket and has a nicer tint. Though the X45 does look good on the 1 youtube vid posted so far.
 
Last edited:

jetslipper

Active member
Joined
Apr 20, 2014
Messages
37
cWhJ7u1.png

Turbo max works with lesser batteries too. Even the lowly Panasonic NCR18650B gets it up to 12400 lumens. And since the light doesn't heat up quite so much due to the lower current, the stepdown happens a bit later than on higher current batteries.

Just to clarify, are the Sanyo and Panasonic cells used in the review unprotected? Thanks.
 

Octavian

Well-known member
Joined
Aug 21, 2010
Messages
159
Location
Romania
Great review, thank you for nice details !

So...no "safe" constant output in the high modes, right ? Even at 4000lm we have a temperature which is uncomfortable to hold in hand after few minutes and flashlight still don't make any step down till you step down manually or risk to burn your hands... So I stick with 1500 lumens...

Acebeam make nice flashlights ( I have 2 of them) but they have some problems with thermal protection (or is intentional...? ) . This flashlight is good to keep without batteries if you have a child , and maybe in a box locked in a hidden place...like a gun, with no bullets and hidden.
The EC60 I like (didn't like at the beginning ) , but to be in my hand, not to my wife or my child, on max output is high risk to burn your hand, because has no step down (at least me I didn't have the courage to hold till step down, is really too hot ! ) . Same with the K60.

Because of this, in this category I prefer more the Olight X7, even if is less bright (but is more compact), it has a very good/safe thermal protection, safe to use by any member of the family.
 

Capolini

Banned
Joined
Aug 4, 2013
Messages
5,947
Location
Valley Forge, Pa.
Thanks for the detailed review.

I am either missing something or the info. provided is contradictory.

In the one graph for TURBO MAX you have it @ 14,890L, then 4310[3:30 step down]

For Turbo max on the 30sec/1m/2m/5m graph you have 14890-30s/14450-1m/13000-2m/8550[5m].

How could the output be almost double[8550] after 5 minutes than it is after 3:30[4310] in your First graph that I mentioned?
 
Top