Weltool T11 Demon Carver Flashlight Review

Weltool T11 Demon Carver Flashlight Review

The Weltool T11 Demon Carver flashlight features an Osram emitter and just an absolutely massive throw. Read on for testing!

Official Specs and Features

Here’s a link to the Weltool T11 “Demon Carver” Flashlight product page.


There is only one version.


The T11 is going for just over $100 right now and can be purchased on amazon.  I’ve just joined Amazon affiliates – that’s my first Amazon affiliate link.  I have no idea how it works, but I’ll receive a little if you purchase from that link.  I’d appreciate it greatly!

Short Review

I measure the throw on this light much higher than rated, and it’s already rated very high.  This thing throws ridiculously.  Just crazy throw from a single 18650 light.

Long Review

The Big Table

Weltool T11
Emitter: OSRAM OSTAR Projection Compact
Price in USD at publication time: $101.50 on amazon
Cell: 1×18650
Turbo Runtime High Runtime
LVP? Yes
Switch Type: Mechanical
On-Board Charging? No
Claimed Lumens (lm) 743
Measured Lumens (at 30s) 557 (75% of claim)^
Claimed Throw (m) 680
Candela (Calculated) in cd (at 30s) 4260lux @ 6.986m = 207906cd
Throw (Calculated) (m) 911.9 (134.1% of claim)^
All my Weltool 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

  • Weltool T11 Demon Carver Flashlight
  • Yellow lens cover
  • Spare o-ring
  • Manual and paperwork

Package and Manual

The T11 ships in a cardboard box.

The manual is fine.

Build Quality and Disassembly

Weltool is one of those brands I see a lot of on Facebook… That…. is usually not a good sign for most lights.  So to be honest, I wasn’t expecting much out of this light.

But I stand corrected.  This light is very well built and has some nice appointments that I didn’t foresee.

The quality in hand is high – the light doesn’t feel cheap (and it shouldn’t, it’s over $100).

The tailcap in particular was one of those things I thought would be poor quality.  It’s not.  The size and knurling make it very easy to unscrew, and it’s smart to have the knurling here.  Also the larger diameter of the tailcap isn’t a negative – this isn’t a light you’ll pocket anyway.

The body has the same knurling, and it’s worth mentioning that the knurling (diamond pattern, my favorite) is very consistent, grippy, and also not sharp in the least.

The head has some cooling fins

The threads are square-cut anodized, and well lubed.  This allows mechanical lockout past what the mechanical switch offers.

Both the head and tail have springs.  The tailcap can be disassembled easily since the parts are held in with an aluminum retaining ring.

I was not able to remove the head from the body, or the bezel from the head.

The body has marks on the outside showing proper cell orientation.  As usual, the positive end goes toward the head.

Also included is this slip-fit lens cover.  This turns the output yellow, which I presume is useful in hunting some wild animals.

The fit of this cover is very good, and it serves nicely as a protective cover for the lens.

The cover flips open, for easy switching between yellow and white output.

And when I say “flips open” I mean it.  It’s like an automatic knife.  Once you get this cover-up past a certain point, it flings open.

Size and Comps

Dimensions: 53mm (Head Dia.) x 25.4mm (Body Dia.) x 163mm (Length)
Weight: 249.5±0.5 (w/o battery)

This is a good size for a handheld thrower.

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

And here’s 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

Nothing is included for carry of the T11.  No lanyard (and no place to attach one).  No pouch.  No pocket or belt clip, though there seems to be room on the tail end of the cell tube for a very thin friction fit clip.

Basically, roll your own carry method for this light.

Power and Runtime

The T11 is powered by a single 18650 cell.  With both ends having springs, any type of 18650 will work.  The power requirements for this emitter aren’t that great, so really any 18650 would be fine in this light.  I’ve tested here with a low capacity, high current Vapcell G20, but a high capacity lower current cell would be a good solution, too.

Here’s a runtime on High.  I didn’t hit the output specs, but as throwy as this light is, I chalk that up to my PVC tube not responding well to such throw.  Either way, I’m not sweating the output, because the light hits the throw specs (and throw is much more important on this light).

Note a couple of probably surprising things.  First, the output after an initial drop is very well regulated.  Secondly, the light does have LVP.  The stepdown is not good, but the regulated output for almost an hour is.

Output on Low is very flat, and extremely well regulated.  Worth noting here is that I measured throw on Low to be 611m.  So throwing 611m for over 2 hours – that’s probably some kind of record, and certainly for this class light.

At around 3V, the main (aka only) emitter flashes a voltage warning.  At around 2.5V, the light is electrically off.

You might wonder how the yellow cover affects throw?

Low (with yellow): 524m
High (with yellow): 777m

So the cover brings throw down, sure, but 524/777m is still very throwy for this class.

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
High 743 1h40m 557 2.53
Low 297 3h35m 250 0.72

Pulse Width Modulation

No PWM on either mode.

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

There’s a single switch on the T11.  It’s a mechanical forward clicky.  The switch is very proud, which means easy access with or without gloves but also no tailstanding.

Here’s a UI table!

State Action Result
Off Click Low
Off Half Press Momentary
On Click Off
Low Click 2x High
High Click 2x Double blink
Off Tap Click High
Off Tap Tap Click Double blink

LED and Beam

As far as I can tell none of the product documentation indicates what emitter is in this light.  I contacted the sender, and he said it’s an Osram Ostar Projection Compact.  I know nothing about this emitter, including if this is actually the spec sheet for it.  I think this one is sometimes actually used in projectors (hence the name).  So my best guess is this:  OSRAM OSTAR® Projection Cube, LCG H9RM.

Ultimately the point is that the emitter is very tiny which helps make tons of throw.  And this light has the tightest pencil-thin beam I have ever seen.

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

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

Hard to show this since even Low is high enough to wash out the comparison.  I find the tint to be very acceptable though.  I’d put it in the 5500K range.

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


What I like

  • Throw is incredible
  • Seriously the throw
  • Very good build quality
  • Huge fan of the knurling
  • The yellow lens cover is well made (though not useful for me personally)

What I don’t like

  • No pouch or lanyard or belt clip (just pick one of the options and include it)
  • I would like more than two steady modes, and one of those should be very low.
  • “Demon Carver”


  • This light was provided by Weltool for review. I was not paid to write this review.
  • This content originally appeared at zeroair.org.  Please visit there for the best experience!
  • For flashlight-related patches, stickers, and gear, head over to PhotonPhreaks.com!
  • Use my amazon.com referral link if you’re willing to help support making more reviews like this one!
  • Please support me on Patreon!  Feeding flashlights is expensive!  And funding Fun Fund Friday even more so.  I deeply appreciate your support!
Liked it? Take a second to support zeroair on Patreon!

Leave a Reply

%d bloggers like this: