Nextorch E51C Rechargeable Flashlight Review

Nextorch E51C Rechargeable Flashlight Review

The Nextorch E51C is a USB-C-rechargeable flashlight that uses an Osram P9 emitter for high output. Click for more about this tactical light!

Official Specs and Features

Here’s a link to the Nextorch E51C rechargeable flashlight product page.


There is only one version.


Nextorch has the E51C listed at $59.95, and that includes the cell. 

Short Review

The Nextorch E51C is a nice rechargeable flashlight. It has great build quality and a seemingly great interface for tactical situations (specifically, it starts on high). Overall it has a great in-hand feel too, along with robust features. USB-C charging works and is a nice up-to-date offering.

Long Review

The Big Table


Nextorch E51C rechargeable flashlight
Emitter: Osram P9
Price in USD at publication time: $59.95
Cell: 1×18650
Runtime Graphs
Switch Type: Mechanical
On-Board Charging? Yes
Charge Port Type: USB-C
Charge Graph
Power off Charge Port No
Claimed Lumens (lm) 1600
Measured Lumens (at 30s) 1665 (104.1% of claim)^
Candela per Lumen 8.1
Claimed Throw (m) 205
Candela (Calculated) in cd (at 30s) 455lux @ 5.688m = 14721cd
Throw (Calculated) (m) 242.7 (118.4% of claim)^
Claimed CCT
Measured CCT Range (K) 6600-7100 Kelvin
Item provided for review by: Nextorch
All my Nextorch reviews!

^ Measurement disclaimer:  I am an amateur flashlight reviewer.  I don’t have $10,000 or even $1,000 worth of testing equipment.  I test output and such in PVC tubes!!  Please consider claims within 10% of what I measure to be perfectly reasonable (accurate, even).

What’s Included

Nextorch E51C rechargeable flashlight what's included

  • Nextorch E51C rechargeable flashlight
  • Lanyard
  • Charging cable (USB to USB-C)
  • Spare o-rings (2)
  • (Not pictured, because my package did not include a cell) Nextorch 18650

Package and Manual

Nextorch E51C rechargeable flashlight box

Nextorch E51C rechargeable flashlight manual

Build Quality and Disassembly

Nextorch E51C rechargeable flashlight

The E51C is very much like another Nextorch I’ve tested – the TA30 V2.0. Both have great build quality, and the E51C offers a bit of a smaller (and possibly updated) design.

The Nextorch E51C rechargeable flashlight build quality is good. I will mention upfront about these lights (and it’s something I’ve corroborated with another enthusiast, too!). When I opened the package of Nextorch lights, I was not thrilled. Based on the box (specifically how the box felt, not how it looks), I figured the contents would be subpar. The package is simply not great. On the flip side of that is the light itself, which is great. So when you order this don’t get too worried about the package!

The tailcap has a nice beefy spring and robust contact points.

Nextorch E51C rechargeable flashlight tailcap contacts

The threads are very nice, too. More on this photo later, but check out that pocket clip!

Nextorch E51C rechargeable flashlight tailcap threads

Size and Comps

139mm x 27mm x 23mm and 94g without a cell. 

If the flashlight will headstand, I’ll show it here (usually the third photo).  If the flashlight will tailstand, I’ll show that here, too (usually the fourth photo).

Nextorch E51C rechargeable flashlight in hand

Here’s the test light with the venerable Convoy S2+.  Mine’s a custom “baked” edition Nichia 219b triple.  A very nice 18650 light.

Also above is the light beside my custom engraved TorchLAB BOSS 35, an 18350 light.  I reviewed the aluminum version of that light in both 35 and 70 formats.

Retention and Carry

A pocket clip is available (and attached) on the Nextorch E51C rechargeable flashlight. This is a very nice-looking friction-fit (sort of) pocket clip.

Nextorch E51C rechargeable flashlight lanyard attachment points

And despite looking like a collar clip, it’s a friction-fit clip. If you think that it looks captured though, you’d be right – with the tailcap tightened fully (and why wouldn’t you have it tightened fully?), the tailcap covers just a bit of the arms on this pocket clip. So it’s very secure, despite being a friction-fit pocket clip.

It’s also keyed, as you can see below. The clip will only fit in one place. I like that in a clip – that means it’s always reliably in the same spot in relation to other things (like the rotary dial).

Nextorch E51C rechargeable flashlight pocket clip detail

Normally I’d trash this type of lanyard attachment – friction-fit pocket clips aren’t ideal for lanyards. But this clip is (again) captured, so this lanyard is secure. Now you could probably bend the clip, but that’s a different set of issues.

Nextorch E51C rechargeable flashlight lanyard attached

Nextorch does offer the FR-1, which is a tactical grip attachment, and I believe that will fit the E51C.

Power and Runtime

Nextorch includes a cell with the E51C rechargeable flashlight. The cell is a standard button-top 18650, with a capacity of 2600mAh. Note that my package didn’t include an 18650 cell, but I have another Nextorch 18650 light that did include the cell, so I’ve tested the E51C with the Nextorch cell from that package. 

The cell is installed into the E51C in the usual way – positive end (button) toward the head.

Nextorch E51C rechargeable flashlight 18650 installed

In case you forget that the cell tube is also marked with little positive/negative icons.

Here are a couple of runtime graphs on the highest two modes.

Nextorch E51C rechargeable flashlight runtime graph

Nextorch E51C rechargeable flashlight runtime graph

Nextorch E51C rechargeable flashlight runtime graph

The light has an indicator, too. Below, you can see the indicator lit in blue. It’s a nice little circle! The indicator displays information as follows:

Blue: 75-100%
Blue flashing: 50-75%
Red: 25-50%
Red flashing: 0-25%

Nextorch E51C rechargeable flashlight indicator in blue


I said above that this is a “normal” 18650 and that’s true – it’s a standard button top. However, it does offer on-board charging. That’s by way of a micro-USB port in the positive end. I did run a test charging via that micro-USB, which you can see below.

Nextorch E51C rechargeable flashlight micro-USB cell

The E51C also offers charging via a USB-C port that’s accessed by unscrewing the head. The head is captured, and will not come off or unscrew past the point you see below. 

Nextorch E51C rechargeable flashlight charging port

Nextorch includes a short USB to USB-C cable.

Nextorch E51C rechargeable flashlight charging cable

First, here’s the micro-USB charging on the cell. It’s very slow.

Nextorch E51C rechargeable flashlight charging graph

Next up is the USB-C charging from a USB-A port. It’s much faster. Total charge time is under 2 hours. I can’t explain these peaks and valleys.

Nextorch E51C rechargeable flashlight charging graph

C to C charging also works but seems to overcharge the cell! At the end of the charge cycle below, the cell was at 4.3V!

Nextorch E51C rechargeable flashlight charging graph

While charging, the indicator is red. When charging is complete, the indicator turns blue.

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
High 1600 2h30m 1665 4.63
Medium 340 4h15m 345 0.56
Low 28 43h 26 0.04

Pulse Width Modulation

What we see here isn’t really PWM, and you’d be unlikely to notice it anyway. So nothing to worry about. From left to right is highest to lowest (just like the mode order)

For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor.  Also, here’s the light with the worst PWM I could find.  I’m adding multiple timescales, so it’ll be easier to compare to the test light.  Unfortunately, the PWM on this light is so bad that it doesn’t even work with my normal scale, with is 50 microseconds (50us).  10ms5ms2ms1ms0.5ms0.2ms.  In a display faster than 0.2ms or so, the on/off cycle is more than one screen, so it’d just (very incorrectly) look like a flat line.  I wrote more about this Ultrafire WF-602C flashlight and explained a little about PWM too.

User Interface and Operation

The interface used by Nextorch on this light is fairly tactical. First, there’s this very prominent (or “proud”) tailswitch.

Nextorch E51C rechargeable flashlight tail switch

I say “fairly” tactical because as you can see below, the switch isn’t proud. It’s accessible, but the tailcap does stand over it. No problem for me, of course.

Nextorch E51C rechargeable flashlight tail switch

The action is quite deep. Note that this switch cover is metal. It’s a very nice switch cover!

Nextorch E51C rechargeable flashlight tail switch actuation

Here’s a UI table!

State Action Result
Off Click On (High)
Off Press (not a full click) Momentary
On Click Off
Off Double press Strobe^

^ This “double press” can sort of get in the way when you’re advancing through the modes. More often than not, I’d hit strobe while just normal mode cycling.

LED and Beam

Nextorch has used an Osram P9 in the E51C. 

Nextorch E51C rechargeable flashlight emitter

There’s a small reflector too, and it has an orange peel texture.

Nextorch E51C rechargeable flashlight on

Nextorch E51C rechargeable flashlight on

LED Color Report (CRI and CCT)

The order is as used with the mode order of light: High to low. CCT is very cool, at over 7000K for high, and dipping to only around 6500K for the lowest level. CRI is low, at around 70.


These beamshots are always with the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure.

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

I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.

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


What I like

  • Very good output
  • Nicely tucked away USB-C charging port
  • Great ergonomics
  • Lovely captured friction-fit pocket clip

What I don’t like

  • C to C charging overcharges the cell to 4.3V
  • Very cool CCT
  • Low CRI
  • Mode order (as an EDC-er) is backward (for tactical purposes, it’s great)


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