RovyVon E10 Pro Flashlight Review

The RovyVon E10 Pro flashlight was available on Kickstarter and has two CCTs of white LEDs, a green laser, UV, and red output, and runs two 14500 cells. Read on!

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Official Specs and Features

Here’s a link to the RovyVon E10 Pro flashlight product page.

Versions

At least two versions of the RovyVon E10 Pro flashlight are (or will be) available. There’s this higher output version, and a High CRI version, too.

Price

This review hits in some middle ground of timing. My review copy was hung up in customs for a while! So the Kickstarter is closed, and I don’t think orders are open yet. I don’t even see this light on Kickstarter any more (the E10 yes, E10 Pro, no). And it’s not on RovyVon’s site (E10 Lu yes, E10 Pro no.) So I’m not sure on the price!

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What’s Included

• RovyVon E10 Pro flashlight
• RovyVon 1000mAh 14500 (2)
• Charging cable
• Manual etc

Package and Manual

Build Quality and Disassembly

The RovyVon E10 Pro flashlight’s build quality is fine. The light has a bunch of angles and spots to click and pieces that stick out, so there’s just a lot going on. Other users (namely on Reddit) have reported that the E10 Pro had some ‘unfinished’ feeling, and I do see a bit of epoxy that was mentioned.

The battery compartment has a lock switch. In fact, here is where you can see the epoxy. There’s a little dot just on the bottom left half of that switch. I can see why it would be bothersome, but it’s very firm and secure, so hasn’t caused me any problems.

Here’s the ‘hinge side’ of this latching cover. The hinge presses against that rubber grip bit, and that provides (or “causes”) a bit of resistance. It’s much like if the cover were springy and wanted to stay closed. So it’s not a problem, but it causes the nearest cell to require deliberate removal. I don’t love this aspect of the light (but it’s not exactly a problem.)

The negative terminals are both springs and the positive terminals are both buttons.

Size and Comps

81.8mm x 38.2mm x 28.8 mm and 114.5g

Here’s the light in hand:

Here’s the test light with the venerable Convoy S2+. The version below is a custom laser-engraved Convoy S2+ host by GadgetConnections.com. I did a full post on an engraved orange host right here! Or go straight to GadgetConnections.com to buy your Convoy S2+ now!

Also in the photo above, my Standard Reference Material (SRM) flashlight is the Hanko Machine Works Trident, an 18350 light. While I have not reviewed or tested the Gunner Grip version seen here, I have tested a Hanko Machine Works Trident Total Tesseract in brass. I love the Trident, and it’s a striking contrast to the inexpensive Convoy S2+, another great SRM.

Retention and Carry

The RovyVon E10 Pro flashlight features a screwed-in, two-way pocket clip.

You can see it in the photos above, but the whole clip area screws into a little bumped-out area on the back of the light. I am not sure what this area is. I would guess electronics or whatever, but it adds a good bit of unwelcome (and annoying) thickness to the light.

The pocket clip has a lanyard loop. No lanyard is included.

And in the tailcap is a magnet perfectly suitable for holding the RovyVon E10 Pro flashlight. Sorry, forgot to grab a photo of that!

Power and Runtime

The RovyVon E10 Pro flashlight is powered by one or two 14500 cells. Two 1000mAh RovyVon cells are included with the package. They are button top cells with USB-C charging ports.

Both cells go with the positive end into the light. This does mean the cells are in parallel configuration, and that the light will work with just one cell (in either bay).

You’ll note that there are two runtime tests for Medium mode. That’s because in one test, one of the two cells was not discharged at all (you can see that in the data below). One of the two cells wasn’t making contact! (Somehow.) So the runtime should be approximately half of what it’d be if you were using two cells. So I decided to test that, and sure enough. I found that this review copy of the RovyVon E10 Pro flashlight has a cell preference. One of the two included cells just doesn’t work great in one of the two bays. So what I always did for further testing was put one cell into the “less great” bay and make sure the light worked. Then put the other cell in the other bay and make sure it worked. It wasn’t a perfect scenario, but I also didn’t have that problem again.

A user may never even notice this, unless they were paying very close attention to the actual runtime numbers.

The temperature lines in these charts are included as general context, not precise measurements. The values represent the range (min to max) during testing, but should not be taken as exact readings. A temperature sensor is not always attached to the bezel (or even the hottest spot, assuming that could be defined). Even with ideal placement, too many variables affect temperature to definitively state a specific max value.

Charging

The RovyVon E10 Pro flashlight does not offer built-in charging. The two included cells do have USB-C charging, though.

A USB to USB-C cable is included.

These charge graphs will be a bit unusual. Since the light doesn’t have built-in charging and uses two cells, to log them, I had to run them consecutively. I think most users would never do this. They are much more likely to just throw these two cells in a bay-charger. That’s what I’d do if I weren’t specifically trying to record the data. That’s also better because your cells are more likely to end at exactly the same voltage. Less important for a parallel (over series) setup, but still something I prefer.

Modes and Currents

Mode	Mode Claimed Output (lm)	Claimed Runtime	Measured Lumens	Tailcap Amps
Front White Turbo	1600	50m	1153 (0s) 1098 (30s)	4.30
Front White High	700	1h	450 (0s) 446 (30s)	1.54
Front White Med	300	2h	169	0.60
Front White Low	50	8.5h	36	0.10
Front White Eco	5	50h	8.1	0.03
Side White High	170	4h	95	0.43
Side White Med	30	19.5h	21	0.08
Side White Low	5	50h	4	0.03
Laser Low	<0.39mW	–	–	[low]
Laser High	<5mW	–	–	0.02
Red Low	1	52h	–	0.02
Red High	90	9.5h	–	0.18
UV	1.2W	5.5h	–	0.36

Pulse Width Modulation

None of the white LED modes use PWM.

Click here to 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

The RovyVon E10 Pro flashlight uses three buttons for control. In the photo below, the left button controls the side emitters on the front. The middle (and rotary) button controls the front emitters. The right side button controls the laser. The manual names those buttons in this same way.

In addition to all the buttons, there’s an OLED display. It shows voltage, output, and which emitter is on.

Here’s a user interface table!

State	Action	Result
Off	Click Left Button	Side white low
Side white on	Click Left Button	Side white advance (LMH)
Side on	Hold Left Button	Side Off
Off (or any “Side on” state)	Double click Left Button	Red Low
Red on	Click Left Button	Red advance (High-Flash-Beacon)
Off	Triple click Left Button	UV on
UV on	Click Left Button	Off (note the difference here – the other two side options were hold for off)
Off	Click Right Button or Click Middle Button	OLED readout of voltage
Off	Hold Right Button	Momentary Laser Low
Off	Double click Right Button	Laser Low
Laser Low	Click Right Button	Laser High
Any side emitter on	Any Right Button action	No change
Laser on	Any Left Button action	No change
Off	Scroll Middle Button	No change
Off	Double click Middle Button	ECO
ECO	Scroll Middle Button	Front white output change (roll forward for increase, roll backward for decrease)
Off	Hold Middle Button	Front white Momentary Turbo
On	Hold Middle Button	Off
On	Click Middle Button	Front white mode advance (LMHT)

LED and Beam

The two front emitters appear to be Luminus SFT-25R. RovyVon states that these are cool white. A high CRI version is also available!

Each front emitter has a little smooth reflector. These make for a very nice beam!

The laser has a little indicator icon on the side. It really is more to indicate which switch to use, as the laser itself comes out from between the white emitters.

LED Color Report (CRI and CCT)

The front white emitter output is, in fact, cool white. It’s also low CRI. The side white (second row) is much warmer, but still low CRI.

CCT (Correlated Color Temperature) refers to the measurement of the color appearance of light, expressed in Kelvins (K), which indicates whether the light is warm (yellowish) or cool (bluish). A lower CCT (below 3000K) is considered warm light, while a higher CCT (above 5000K) gives cooler, bluish light.

CRI (Color Rendering Index) is a measure of how accurately a light source renders colors in comparison to natural sunlight. Scored on a scale from 0 to 100, higher CRI values indicate that colors appear more true to life and vibrant, similar to how they would look under the sun.

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.

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. These photos are taken around 18 inches from the door.

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

Summary and Conclusion

I find the RovyVon E10 Pro flashlight to be an interesting entry into the flat light world. RovyVon is no stranger to this category, so we should expect a fairly mature product line here.

The Big Table

RovyVon E10 Pro
Emitter:	Luminus SFT-25R (2) (Cool White)
Price in USD at publication time:	?
Cell:	2×14500
Runtime Graphs
LVP?	Yes
Switch Type:	E-Switch
Quiescent Current (mA):	?
On-Board Charging?	Yes
Charge Port Type:	USB-C (on cell)
Charge Graph
Power off Charge Port	–
Claimed Lumens (lm)	1600
Measured Lumens (at 30s)	1098 (68.6% of claim)^
Candela per Lumen	24.1
Claimed Throw (m)	200
Candela (Calculated) in cd (at 30s)	747lux @ 6.02m = 27072cd
Throw (Calculated) (m)	329.1 (164.6% of claim)^
Claimed CCT	Cool White –
Measured CCT Range (K)	Cool White 6000-7000 Kelvin
Item provided for review by:	RovyVon
All my RovyVon 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 I like

• Neat side-by-side 14500 format
• Has a laser
• Laser has two modes!
• There’s a high CRI option
• High output option has a great beam profile
• Two good red levels

What I don’t like

• Battery contact concerns
• Rotary controller not super useful
• OLED also not super useful
• Lacks built-in charging (yes, I said that)
• Warm side emitters aren’t high CRI

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Notes

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