Sofirn SC31 Flashlight Review

Official Specs
Short Review
Long Review
  What's Included
  Manual and Packaging
  Build Quality and Durability
  User Interface and Operation
  LED and beam
  Tint vs...
  Beamshots, Runtime, etc table.
  What I like
  What I don't like
Up Next


Here’s another Sofirn light – one not meant to be a barn burner, but just a solid performer in general.  It’s an 18650 light, with on-board charging.  Read on!

Official Specs and Features


Just one version!


This one goes for $17.86 on amazon right now.

Short Review

This isn’t a bad light, and certainly not for the $17.86 going price.  Other competitors like the Convoy S2+ make this a harder choice.  But as it’s a full package light, it’s a great contender!

Long Review

What’s Included

  • Sofirn SC31 Flashlight
  • Charge cable
  • Lanyard
  • Spare o-rings (2)
  • Manual and paperwork


Package and Manual

Typical Sofirn package:

And the typical Sofirn manual.  It’s nice with the illustrations.  There are a few languages included.


Build Quality and Disassembly

Of all the Sofirn lights I’ve handled, this is probably the least of a joy to hold.  The switch is very proud, the anodizing (or something?) overall makes this one feel … lower quality.  That said, there are great points about the light, like the threads and the tailcap.


The anodizing is a little shiny.

The threads are very smooth.  Also anodized, which allows easy mechanical lockout.  The tailcap is long and is covered with knurling, so it’s easy to manipulate.



The threads on both the head and tail end of the cell tube are anodized, square cut, very lightly lubed, and extremely smooth.  Since they’re anodized, mechanical lockout is easy.


Both the head and tailcap have thick springs.



Dimension: 117.5 mm (length)*25.4mm(head diameter)
Weight:60 gram (without batteries)

This one measures up nicely with the Convoy S2+, but adds on-board charging, and has an e-switch on the side.


The pocket clip seen below comes installed.  It’s not a great clip – the ‘cheapish’ variety, and clips to only one end of the light.


Also included is a lanyard.  The only place to connect it is the pocket clip.  I find that a bit strange but probably the lanyard being included was the vestiges of some other light Sofirn makes.  In any event, free lanyard….


This light is powered by (and only by) an 18650 cell.  Sofirn includes a 2200mAh button top 18650, seen below.  It’s an ok cell, nothing that will set any records, but it’s well suited for this particular light.

Here’s a runtime on High.  There isn’t even a Turbo mode on this light, so this is the highest mode, at around 500 lumens.  Temperature is a non-issue, and after a brief stint on High, the light steps down.  This stepdown is still higher than the Medium mode.


Here’s the Medium runtime.


This light does not have LVP.  There’s a switch warning at 2.8V and below – two blue blinks – and that warning continues all the way down.  Main output, and warning output continue to dim, but never seem to shut off.

The SC31 also has on-board charging, via a micro-USB port in the head.  The rubber boot fits quite snugly, is easy to open, and sits a little proud on the body.

A charge cable is included – USB to micro-USB.


Charging is fairly good.  The CC rate is around 0.9A (not bad), and charging terminates well under 4.2V (not bad).  It’s also consistent, as seen below (good).  Note that the cell tests a little above capacity, which is unusual for this test.


While charging, the indicating switch blinks.  When charging is complete, the indicator stays lit blue.

User Interface and Operation

There’s a single switch on the SC31.  It’s a side e-switch, with two blue indicating LEDs.


Below you can see the switch indicating blue.  It’s quite proud, this switch, and also a little mashy



Here’s a UI table!

State Action Result
Off Click On (Mode Memory)
On Hold Mode Advance (LMH)
Off Hold “Breathing” Switch Indicator
Breathing Click Off
Any (Except Breathing) Double Click Strobe
Strobe Click Previous mode
On Click Off

It’s really a very simple UI.


Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
High 610 2h42m 480 1.30
Medium 200 9h7m 150 0.33
Low 10 179h33m 12

LED and Beam

The emitter of choice for this light is the Cree XP-G3.  Really that’s not my favorite emitter, but this is truly the best instance of this emitter that I’ve handled.  The reflector is mostly smooth, and mid depth.


The beam has some purplish at the edges, but is overall not bad at all.  It’s mostly spot, with moderate spill, too.

Tint vs BLF-348


Beamshots, Runtime, and Lux Measurements

Sofirn SC31
Emitter Cree XP-G3
Emitter Notes
Cell 18650
Runtime Chargetime
LVP? Warning
Claimed Lumens (lm) 610
Lux (Measured) 288 lux @ 4.493 m
Candela (Calculated) in cd 5813.9
Throw (Calculated) (m) 152.5
Throw (Claimed) (m) 141

Random Comparisons and Competitive Options….


What I like

  • Not a Lumen Chasing light.
  • Full package light with charging and a cell
  • Indicating switch

What I don’t like

  • Switch boot too rubbery
  • Indicating switch doesn’t really indicate enough
  • Cree XP-G3

Up Next

Still working on some more things for this week – maybe something for Thursday and Friday both!  Stay tuned!


  • This light was provided by Sofirn for review. I was not paid to write this review.
  • This content originally appeared at  Please visit there for the best experience!
  • Whether or not I have a coupon for this light, I do have a bunch of coupons!!  Have a look at my spreadsheet for those coupons. It’s possible to subscribe and get notifications when the sheet is edited!!

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