Acebeam E10 Osram (White) Flashlight Review

The Acebeam E10 Osram flashlight packs quite a throwy punch! It’s a 26350 cell dedicated thrower, and quite a thrower it is. Read on!

Official Specs and Features

Here’s a referral link to the Acebeam E10 Osram (White) Flashlight product page.

Versions

There is only one body type available, but three emitters are offered. Osram white (seen here), Osram Green, and Osram Red.

Price

This lists for $57.30. Buy yours at KillzoneFlashlights when they’re available! (referral link)

Short Review

For the price of $57, there is a lot of fun to be had with this light. So I have to say, you should definitely buy this light. I don’t often suggest so wholeheartedly, but …. wow is this fun.

Long Review

The Big Table

Acebeam E10 Osram (White) Flashlight
Emitter:	Osram (White)
Price in USD at publication time:	$57.30. Buy yours at KillzoneFlashlights when they’re available!
Cell:	1×26350
Turbo Runtime	High Runtime
LVP?	Yes
Switch Type:	E-Switch
Quiescent Current (A):	?
On-Board Charging?	Yes
Charge Port Type:	Micro-USB (on cell)
Chargetime
Power off Charge Port with no Cell?	?
Claimed Lumens (lm)	760
Measured Lumens (at 30s)	543 (71.4% of claim)^
Candela per Lumen	201.6
Claimed Throw (m)	562
Candela (Calculated) in cd (at 30s)	2310lux @ 7.3m = 123100cd
Throw (Calculated) (m)	701.7 (124.9% of claim)^
All my Acebeam reviews!

^ Measurement disclaimer: Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.

What’s Included

Acebeam E10 Flashlight
Acebeam 2000mAh 26350 cell
Spare o-rings (2)
Charge cable (USB to micro-USB)
Manual and papers

Package and Manual

A white product box for an Acebeam E10 flashlight with an image of the flashlight on the front, set against a weathered wooden background.

A white rectangular box labeled PLATO stands vertically on weathered wooden boards. The side lists options with checkboxes and lumens for OSRAM LEDs in red, blue, and green. Compliance icons appear at the bottom.

The back of a product box with a detailed specifications table, instructions, and company information in black and red text, placed on weathered wooden planks. A barcode and Made in China label are visible at the bottom.

Build Quality and Disassembly

The E10 is a nice sturdy little light.

A black, compact flashlight stands upright on a wooden surface, photographed with a shallow depth of field. The flashlight has textured grip sections and a metallic ring near the lens.

A black flashlight with a textured grip stands upright on a wooden surface. The background is blurred, and the flashlight is centered in the image. The text ZEROAIR.ORG appears vertically on the left side.

A black flashlight stands upright on a weathered wooden surface with a blurred background. The flashlight has textured grip sections and a silver button on its side. ZEROAIR.ORG is faintly visible on the left edge.

The knurling is good – This is the type of knurling Acebeam uses almost always, so … it’s good stuff.

The body is a one-piece – the tail cap doesn’t come off. The threads are square-cut, anodized, nice and thick, and well lubed. The threads are great. They’re kind of long though, so a good bit of twisting is required here.

Both the head and tail have springs, and the tail spring has a good bit of travel. You’ll have to sort of squeeze the body and head together when you’re screwing the light together, or the cell will stick out too far for the threads to grab. No big deal, and it’s not difficult.

The button is just proud and not hard to find.

There’s no traditional reflector. This is an optic of some sort – the kind most often seen with flat whites.

Now if you’re anything like me, you saw these three dots in the product photos and put together that this light has three options: white, green, and red, and thought that this light has them all. It doesn’t; those dots are something else. Each light has only one emitter (red or white or green). I was disappointed when I realized that (only after I had the light in my hand) but for the price I still consider the light a massive win!

Low is very low as far as output goes but even low still has some distance to it.

Size and Comps

Officially the light is 91mm long, 40mm (head) and 31mm (tail) diameter. Weight is 137.4g with cell.

A black ACEBEAM flashlight is placed on top of a two-dollar bill, both resting on a wooden surface. The flashlight is horizontal, partially covering the bill.

A black Acebeam E10 flashlight is placed on top of a two-dollar bill featuring Thomas Jefferson, both lying on a weathered wooden surface.

A two-dollar bill lies flat on a weathered wooden surface, with a plastic cup viewed from above partially obscuring the bills right side and creating a circular blur in the images foreground.

A hand holding a black Acebeam E10 flashlight, with a silver button and textured grip, against a blurred outdoor background. The person is wearing an orange wristband.

A person wearing an orange watch holds a black Acebeam E10 flashlight in their palm. The background is grassy and blurred.

A person with a light skin tone and wearing an orange wristwatch holds a black flashlight labeled “ACEBEAM E10” in their right hand, against a blurred green background.

A hand holding a flashlight with the lens facing the camera; the person wears an orange wristband. The background is blurred and green.

A red cylindrical flashlight with a pocket clip stands next to a shorter, black, wide-headed flashlight labeled ACEBEAM E10 on a wooden surface. The background is blurred.

A close-up view of a flashlight and its battery, both lying horizontally on a wooden surface, with the ends facing the camera to show the battery terminals and the interior of the flashlight.

Throwing in this Malkoff flashlight because it has the same emitter and has a similar reflector.

Two flashlights stand upright on a wooden surface. The left flashlight is taller with an orange, textured grip, while the right flashlight is shorter, black, and has a knurled grip. The background is blurred.

Two flashlight heads are placed side by side, facing upward, on a wooden surface. The left one is black and smaller; the right one is white and larger, both showing their internal reflector structures.

Retention and Carry

Not one single thing is included for carry of the E10. No pocket clip (though there appears to be a place to attach one on the tail end). No pouch, no lanyard (and no lanyard holes). No magnet (and the light is small enough that a magnet would probably work).

Surprisingly the light is more or less pocket friendly. Maybe cargo pockets…

Power and Runtime

The E10 is powered by a single lithium-ion cell. In this case, it’s a 26350, a generally “rare” cell, which is included with the light. I’d love to see an 26650 body offered for the head down the road.

The included cell is a 2000mAh “flat-top” (flat with just a little bit of bump). It also sports micro-USB charging.

A close-up of an orange ACEBEAM 2000mAh battery lying on its side on a wooden surface, with technical markings and symbols visible on its label. The background is blurred.

A single orange ARC26350HC-200A rechargeable battery with black ends rests on a wooden surface. The battery label indicates 3.7V, 7.4WH, and features overcharge and discharge protection circuits.

There’s a little red/green indicator dot on the positive end of the cell (seen below left, at around 2 o’clock.)

A single red and black cylindrical battery, perfect for devices like the Acebeam E10 Osram, rests on a wooden surface with its metal terminal facing the camera. The background is blurred.

A close-up of a single orange cylindrical battery lying on its side on a wooden surface, with text and symbols faintly visible on the battery’s side.

The cell goes into the light in the usual way – positive terminal toward the head.

Here are a couple of runtimes – Turbo and High. The light exhibits LVP, at around 2.8V. Based on bench power testing, the light also seems to flash a warning when the cell gets depleted.

Output is low, yes. 543 measured lumens is just not very much but this is a dedicated thrower. See above in The Big Table, the relatively new “Candela per Lumen” part? On this light it’s 201.6. That’s absolutely massive. Ridiculously massive! So to be clear, you aren’t buying this light for big lumens, you’re buying it for throw!

Turbo isn’t regulated at all. High is very well regulated!

Charging

There’s a charge cable included – USB to micro-USB.

A black USB cable is neatly coiled and secured with a white twist tie, lying on a wooden surface with a blurred background.

A close-up of a black earbud with a visible micro USB charging port resting on a weathered wooden surface. The background is blurred, drawing attention to the earbud.

A close-up of a black USB flash drive lying on a wooden surface, with the metallic connector facing the camera. The background is blurred.

This cable is for use with the included cell – a 26350.

There’s an indicating LED on the positive end of the cell – red means charging, green means charging is complete. Charging is fairly slow, at around 0.5C – or 0.8A. That’s fine though; in my opinion slower is better.

Modes and Currents

Mode	Mode Claimed Output (lm)	Claimed Runtime	Measured Lumens	Tailcap Amps
Turbo	760	1h30m	542	2.92
High	310	2h45m	226	0.73
Mid	150	6h45m	105	0.29
Low	20	46h	12	0.04
Moonlight	1	1850h	0	~

Pulse Width Modulation

There’s a bit of sawtooth on the lowest mode (possibly Low too), but I don’t notice it in real life.

Oscilloscope display showing a mostly flat yellow waveform near the center, indicating little signal activity; grid lines and settings such as 10mV, 50µs, AUTO, and -1mV are visible on the screen while testing an Acebeam E10 Osram.

An oscilloscope screen displays a yellow waveform with small fluctuations, gridlines, and labels such as HOLD, Waiting, 0.2V DC, 50us, AUTO, Int, and -0.02V—capturing the output response from an Acebeam E10 Osram flashlight test.

Oscilloscope screen displays a mostly flat horizontal line with minimal fluctuations, capturing the Acebeam E10 Osram's output. Settings shown include 5V, DC, 50 microseconds/division, AUTO mode, 0.60V baseline, and HOLD status at the top left.

An oscilloscope screen shows a flat yellow signal line at 0 volts, with labels indicating 5V per division, 50 microseconds per division, and a trigger level at -0.60V. Status reads Waiting—much like an Acebeam E10 Osram standing by for activation.

Digital oscilloscope screen displays a mostly flat waveform near the center, with minor fluctuations—capturing signal output from an Acebeam E10 Osram. Status indicators read HOLD and Waiting, with measurement settings along the bottom.

Here’s a blow-up on those two modes – a longer timeframe for a bigger picture.

Oscilloscope screen displaying a mostly flat yellow waveform with minor fluctuations, gridlines, and labels such as “Holdoff,” “0.5V DC,” “2ms,” and “AUTO,” captured during Acebeam E10 Osram flashlight output testing.

Here you can see a “baseline” – a chart with almost no light hitting the sensor.

Then there’s the Ultrafire WF-602C flashlight, which has some of the worst PWM I’ve seen. It’s so bad that I used a post about it to explain PWM! Here are multiple timescales (10ms, 5ms, 2ms, 1ms, 0.5ms, 0.2ms) to make comparing this “worst” PWM light to the test light easier. That post also explains why I didn’t test the WF-602C at the usual 50us scale.

User Interface and Operation

There’s just one switch on the E10. It’s a rubber-covered e-switch, and the pad is plenty big.

Here’s a user interface table!

State	Action	Result
Off	Click	On (Mode Memory)
Off	Hold	Moonlight
Any	Double Click	Turbo
On	Hold	Mode Advance (LMH)
On	Click	Off
Turbo	Double Click	Previous mode
Off	Long Hold	Lockout (Technically Moonlight then lockout) (flashes 3x to confirm lockout)
Lockout	Long Hold	Unlock (2x flash to confirm)

LED and Beam

The emitter in my copy is the white version of this Osram emitter. Also available are red and green Osram options.

There’s an optic in here, which seems to be most often used with the Osram Flat emitters (but maybe not exclusively). It’s unusual – despite how it looks there’s also a lens over this optic, so it’s smooth across the top.

A bright circular light is projected onto a wooden fence at night. The foreground is blurred, and the text ZEROAIR.ORG is faintly visible on the left side of the image.

LED Color Report (CRI and CCT)

IES TM-30-18 Color Rendition Report featuring charts, graphs, and data tables for the Acebeam E10 Osram light, including spectrum, color fidelity (Rf), color gamut (Rg), chromaticity, and test results.

A color rendition report for the Acebeam E10 Osram flashlight shows various graphs and data, including a color vector graphic, bar charts, numerical values, and a ZeroAir watermark at the top right.

A detailed IES TM-30-18 color rendition report for a Germ (Wurkkos) LED and Acebeam E10 Osram, with graphs showing color vector analysis, color fidelity, color gamut, wavelength spectrum, and color shift results.

A detailed IES TM-30-18 color rendition report for the Acebeam E10 Osram, showing color vector graphic, spectral power, numeric color values, color distortion, and reference versus test light comparisons.

Beamshots

These beamshots always have the following settings: f8, ISO100, 0.3s shutter, and manual 5000K exposure. These photos are taken at floor level, and the beam hits the ceiling around 9 feet away.

A mostly black image with a faint, small light spot in the center and the text ZEROAIR.ORG vertically along the left side.

A small, bright white circle is centered on a black background. The glow around the circle fades gradually into the darkness. The text “ZEROAIR.ORG” is vertically aligned on the left side.

A bright white light source is centered against a dark background, with a soft glow radiating outward. The text ZEROAIR.ORG is visible vertically on the left side of the image.

A bright white light source is centered in a dark background, creating a circular glow or halo effect. The text ZEROAIR.ORG is vertically aligned on the left side of the image.

A bright, circular white light is centered against a dark background, creating a gradient halo effect. The text “ZEROAIR.ORG” is visible on the left side of the image.

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

I keep the test flashlight on the left and the BLF-348 reference flashlight on the right. And this time I did all the modes vs the one mode of the BLF-348. Let me know if that’s something worthwhile.

A dark background with two white circles of light, one small and dim on the left, and a larger, brighter one on the right. The text ZEROAIR.ORG is vertically aligned on the left side.

Two flashlight beams are projected onto a dark door. The beam on the left is smaller and brighter, while the beam on the right is larger and dimmer. The background is mostly in shadow. The text ZEROAIR.ORG is visible.

A gray door with two bright flashlight beams shining on it side by side. A hand holding a flashlight is partially visible at the bottom center of the image. The text ZEROAIR.ORG is on the left side.

A bright flashlight beam shines directly onto a white paneled door in a dimly lit room, creating a circular glare. The tip of the flashlight is partially visible at the bottom of the image.

A bright flashlight beam shines directly onto a white paneled door in a dimly lit environment. The flashlight itself is partially visible at the bottom of the image.

I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!

Conclusion

What I like

Massive throw
Full package
It’s tiny!
Did I mention the crazy throw?
Three total emitter options are available.
Easy to grasp UI.

What I don’t like

I’d like a 26650 option
The switch is just a bit mashy

Notes

This light was provided by Acebeam for review. I was not paid to write this review.
This content originally appeared at zeroair.org. Please visit there for the best experience!
Use my amazon.com referral link if you’re willing to help support making more reviews like this one!
Please support me on Patreon! I deeply appreciate your support!

Robert Edward Mazur

2020-07-18 at 9:55 pm

Hi,

In your best estimate how much spill is there? 10%.20%,30% of the total lumens[output]?. I know it is a mini thrower but would like to know if there is enough spill to walk on the hiking trail.
On turbo it just gradually loses output and there is no step down?
Never liked or had any use for USB charging. Can the battery be charged in a regular charger? I would think so.

Thanks for the review.

zeroair
2020-07-19 at 2:38 pm

I would not pick the E10 as a hiking light. Regardless of spill percentage….

That’s right, unregulated output that just wanders down along with cell voltage..

Yes just about any charger capable of charing 18350 cells should charge this cell just fine. (I’m with you on in-light charging.)

Anthony

2020-07-30 at 2:41 pm

You wouldn’t use it as a hiking light you said ..so using it for camping, hiking, night walks etc wouldnt be advised ❓What else would it be used for then ❓that’s what most of us buy this kind of light for isn’t it ❓

Nick

2020-10-02 at 5:32 pm

You should review the Manker MC13 and compare it to this Acebeam E10. Pretty sure they use the same optic and emitter so it would be interesting to see how they stacked up. I went with the MC13 due to the option of both 18650 and 18350 tubes being available.

zeroair
2020-10-02 at 5:40 pm

I would love to. I can never get anyone from Manker to reply to my messages. And I can’t buy all the lights…. 🙁

Pingback: Acebeam L17 - Really the Longest Throwing Tactical 18650 Flashlight? - A Review.

Seawolf

2021-02-07 at 3:33 pm

Was Playing around with my Lights and Discovered that The Battery Tube of the Sofirn SP33 Fits perfectly with the E10 so can use with a 26650 as well.
I always worry about some of these non Common Battery Forms. You gave me the idea reading you review on the Gt Nano, and found an obscure aaa light with A Tube that Fits.

zeroair
2021-02-08 at 11:55 am

Very nice!

John

2021-04-09 at 9:19 am

Your runtime plot on turbo looks completely different from the one that 1lumen got in his review of the Acebeam E10. His runtime plot showed a regulated output, with max output for 3 minutes followed by a hard drop to 60% output and remaining flat for about 90 minutes, and then another drop to low remaining flat for another 70 minutes. Did Acebeam send you an early, preproduction version of the E10?

zeroair
2021-04-10 at 7:08 am

Sorry, I don’t know if they sent an early or preproduction E10.

Acebeam E10 Osram (White) Flashlight Review

Acebeam E10 Osram (White) Flashlight Review

Official Specs and Features

Versions

Price

Short Review

Long Review

The Big Table

What’s Included

Package and Manual

Build Quality and Disassembly

Size and Comps

Retention and Carry

Power and Runtime

Charging

Modes and Currents

Pulse Width Modulation

User Interface and Operation

LED and Beam

LED Color Report (CRI and CCT)

Beamshots

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

Conclusion

What I like

What I don’t like

Notes

10 thoughts on “Acebeam E10 Osram (White) Flashlight Review”

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