Weltool T15

1lumen selects and reviews products personally. We may earn affiliate commissions through our links, which help support our testing.

Weltool T15 Specifications & measurements

Brand & Model	Weltool T15
Flashlight category	Penlight, 2AA flashlight (size)
Battery config.	1*14100 battery pack or 2*14500
Switch type	Rear only
Dimensions:
Length	168 mm
Head diameter	25 mm
Weight with battery	141 g
LED & Beam
LED type	Unknown
High CRI	No
Focusable beam	No
Features
Onboard charging	No
Power bank	No
Specifications and measurements
Specified output	1,100 Lumens (with battery pack)
Measured output (30sec)	891 lm
Max. measured output	956 lm
Specified beam distance	417 m
Measured beam distance (30sec)	385 m
Specified beam intensity	43,500 cd
Measured beam intensity (30sec)	37,125 cd
Overall rating	4 stars
Review publication date	August 2025

Remember your ‘firsts?’ Like your first favorite toy, the first time you rode a bike without training wheels, first crush, or (for those older amongst us) first car? For a flashlight guy or gal, you probably remember your first memorable flashlight. For this reviewer who’s handled and seen a lot of flashlights, I remember my first Weltool.

Not just because it was a great flashlight with innovative features and design with impressive performance. I remember it for the name: Heaven Soaring Eagle (AKA F6R). My next Weltool the T17 had a similarly unique (and appropriate) name, Ironclad Virtue. Well, our friends at FlashlightGo.com sent me another Weltool to test on, and this one takes the naming convention to a new level of…interesting.

On my desk is the new Weltool T15, and the name? Honestly, this is the first flashlight name that made me laugh because Weltool calls this one the Elfin Flutist. Maybe a member of the marketing team had a dream of an elf sitting on a huge mushroom playing a flute when thinking of the name? Either way, the T15 isn’t a flute for elves, but a 2×14500 size penlight and comes with impressive specs for a penlight along with some cool features and a cool design with all the Weltool goodies and quality I expect.

What’s in the package

The T15 came in a very nice package with a very elegant box. It has a near life-size line drawing of the T15 out front, the name, and some marketing and UPC stuff out back (no specs). The box is super-nice and probably one of the nicest I’ve ever seen in the hundred odd lights I’ve reviewed. Maybe the T15 spent some time in Dubai or Monaco? Inside it’s pretty nice too, with the T15 in cut foam and the lone USB cable. Here’s what you get:

• Weltool T15 Elfin Flutist
• Weltool UB14-18 14100 1800 mAh battery pack (loaded in the light)
• O-ring
• Pocket clip
• USB A to C cable
• Manual

In proper working-light fashion, the T15 comes with everything needed to get running. There’s no lanyard though, and I would have liked to see a holster included. The cell was isolated, and sitting 3.8 volts, which is a bit hot, but guarantees near full output out of the box.

The T15 is part of Weltool’s EDC or tactical-use lineup (T series). These are compact lights that are designed for hard-use as well as being simple, easy to use and handle. The T15 is the newest addition, and is a dual 14500 form factor. It’s thin and pretty lightweight, which I found to be pocketable, but I found it too long and awkward to EDC. However, it rides really nicely in a breast pocket or clipped to a vest or belt. The tube is covered with a super grippy diamond pattern knurling in the middle of the tube and tailcap.

There’s no lanyard holes anywhere on the T15, so you’ll have to get creative if you want one. The rear clicky is easy to reach one handed in all grip positions, and the handling was easy and never felt awkward. You get a detachable deep carry pocket clip, and it can be clipped to at least four different spots on the tube.

There’s two closely spaced obvious mounting points below the tailcap, but there are two more grooves that I could also snap the clip into for bezel up or down carry. The clip is sturdy stainless steel with a PVD finish. It clips on to the rear forward of the tailcap. It isn’t easy to dislodge and really holds on, so no complaints there. 

For switching, you get a mechanical clicky tail switch. It’s a forward switch and the button sits proud and protrudes over the tail a good 5 mm, so that means no tail standing. The boot is grippy rubber, and it has a really nice feel to it. It takes a good amount of force to activate and latch with tactile snappy clicks. Since it’s a rear switch, finding it by feel is no problem at all, and that’s important for a working light, and gloved hands wouldn’t be an issue.

For build quality, Weltool lights are extremely high quality with meticulous quality control and what I consider uplevel attention to detail. The T15 feels very solid with zero quality, fit, functional, or finish concerns, which I expect for a light like this since it carries an MSRP right around $102.00 US. That’s steep for a 2xAA penlight, but there aren’t many premium AA penlights out there, and this is a very high quality item.

The machining on the host is great and Weltool says it’is milled from an undisclosed aluminum, but it could be 7075-T6, and the finishing is flawless with no sharp edges, gaps, or machine marks. In fact, I had a hard time finding joints where things were screwed together, which leads me to think the host is actually one piece with a glued-on screw-in bezel.

The knurling is also meticulously cut. For the finish, it’s type III HA. It’s a matte finish that is nicely grippy and comes in any color you want as long as it’s black. Although not called out in the manual, I’d venture to say it’s probably the proper MIL-STD spec for the anodizing thickness. Rotating the pocket clip around in the slot didn’t mark or scratch it one iota. 

There’s two springs at work in proper working-light configuration: One for the driver and one for the tailcap. I didn’t try to unscrew anything except the tailcap. The rear threads are fully anodized, well lubed, and really thick triangular cut units.

They’re super smooth, and thanks to o-ring seals and probably lots of glue everywhere, Weltool gives the T15 full IP67 ingress protection. Per Weltool, it’s also been tested for 1 meter drop resistance. No, I’m not going to do a tailcap-off water test like the T17 (that ended up not ending well for the T17).

For the warranty, Weltool is one of the best in the business. From Weltool.com: Please know that we stand behind our products 100%. Weltool warrants its products to be free of defects for a lifetime of use. We will repair any light device which is found to be defective under normal use. From the date of sale (the serial number on the Lights body can show the date), the limited warranty for LED products is 5 years, and the warranty for LEP products is 2 years.

The above free warranty does not cover any damages or failure caused by:

Problems caused by alteration, misuse, abuse, or unreasonable

Battery leakage , improper operation or using poor quality battery

The products do not purchase from Weltool directly or its authorized dealers or other illegal way

Broken lens caused by external force

Lamp, switch runs out of its lifespan

Rubber cap, O ring’s naturally aging

Normal wear and tea, imprinting, or color finishes

Other problems caused by improper operation

Discontinued products

If Weltool products don’t work because of your improper operation, we can provide paid maintenance. Labor is free but we will charge for parts. The total repair fee is assessed according to the cost of the replaced materials. Freight should be paid by customers. This limited lifetime warranty also excludes batteries, chargers, switches and electronics.

Weltool likes to keep the LED incognito here, only referring to it as a high-power white X-LED. However, peering down the reflector, keen-eyed readers will immediately identify the LED as a Luminus SFT-25R. This is a 3535 footprint (3.5 x 3.5 mm). It’s the old-school lateral construction (with four bond wires potted in the substrate) with a tiny round LES.

This one’s pretty new to the flashlight space, and it’s already established itself as a really nice 3535 size option that works well in reflectors and optics, especially in smaller flashlights like the T15. The CCT isn’t listed, but it’s cool white and low CRI.

The reflector is a SMO unit (and flawlessly done), and the hardened AR coated (green to minimize the +duv you get with the SFT-25R) glass is very well protected by a chonky bezel: It’s recessed a good 6 mm, so headfirst drops would be unlikely to damage the lens.

The beam is a nice one for this type of light. The hotspot isn’t super tight, but is bright and there’s ample spill. It performs well at short and long ranges too. In fact, the T15, with a sub 25 mm head, throws farther than some larger flashlights (on paper).

More details: 

• LED Type: Unknown
• High CRI: No
• Focusable beam: No

Spectral measurements: 

I used a Opple Lightmaster Pro to measure the flashlight at 1 meter distance. 

Mode:	CCT:	CRI Ra:	duv
High	6085K	65.4	0.0062
Low	3942K	63.8	0.0089

Dimensions: 

Weltool T15	Millimeters	Inches
Length	168 mm	6.6 in
Head diameter	25 mm	1 in
Body diameter	22 mm	0.9 in

Dimensions are rounded to the nearest millimeter and the nearest tenth of an Inch.

Weight: 

Weltool T15	Weight in grams	Weight in oz
Without battery:	98 g	3.4 oz
With included 14100 battery	141 g	5 oz
With two Shockli 1000 mAh 14500	138 g	4.9

Weight is rounded to the nearest gram and tenth of an Oz.

Flashlight size comparison with its competition:

Group 1: Rovyvon H3 Pro, Fenix LD22 v2, Weltool T15, ThruNite Archer 2A v3, Vibelite utility light

Group 2: Fenix PD32R, Weltool T15, Weltool T17, NlightD E1

Group 3 reflectors: Fenix LD22 v2, Rovyvon H3 Pro, Weltool T15, NlightD E1

The T15 features a fully regulated buck driver since you can run two 14500 li-ion cells and 8.4 volts will kill a 3 volt white LED. Weltool’s drivers are pretty good for regulation. As mentioned previously, this one’s also potted and fully protected from vibration, shock, moisture, and detritus. The UI is super simple-almost too simple, but that’s never a bad thing in a light meant for work. It’s two modes, High with a hidden Low mode. Click on, click off. That’s it, and I like simple, but this one’s a bit dualistic. Read on for more.

Available modes: 

• High, Low

Available blinky modes:

• Strobe

From OFF:

• Single click: Turns on in High
• Half-press switch: Momentary on in High mode
• Half-press switch three times: Strobe. In STROBE release and half-press again to enter LOW mode

From ON:

• Fully click switch: Turns off
• Half-press switch three times: Strobe. Release and half-press again for LOW mode. If turned off for more than 1.5 seconds in the LOW mode, the light reverts back to HIGH when turned on.

Mode memory:

• Turns on in High mode each time. If turning off from Low mode, the light will turn on in High mode if left off for 1.5 seconds.

Shortcuts:

• To Low: In STROBE, release and half-press the switch

Strobe/blinkies

•  Strobe. To activate, half-press the switch from OFF or ON three times

Lock-out mode: 

• None, but can mechanically lock the light by unscrewing the tailcap ¼ turn

PWM

• None visible by the naked eye or on the camera!

Additional/summary info on the UI: 

• Again, this is as simple as it gets, and despite it being hidden, I’m really glad Weltool gives a Low mode for lower-light needs or tasks. High is the default mode, and making Low hidden is a nod towards the tactical-use aspect, so it’s not all bad. 
• That hidden Low though was sometimes a pain point though since you have to activate Strobe FIRST before getting to Low, which was annoying as a blistered finger. High isn’t good for everything, so it would have been nice to have Low as a dedicated mode.
• There is LVP, set to turn the light off after a series of warning flashes when the battery gets critically low.

For power, the T15 can use either a 2×14500 battery pack (included) or two 14500 li-ion batteries in series for 8.4 volts, and Weltool gives you some options with that. The T15 includes, by default, Weltool’s own UB14-18 battery pack. This is an 1,800 mAh 4.2 volt pack, and probably contains two 900 mAh 14500 cells cobbled together in parallel. Hmmmm. 

I’m not exactly sure why, but I suspect it’s a nod towards the commonly-available (and safer) pre-made 2P batteries other companies like Fenix and Speras use. In fact, the ARB-L14-1600U2 battery from the Fenix LD22 v2 worked in the T15 just fine.

You can also use two 14500s and Weltool recommends their own UB14-11 li-ion batteries (not included), which have built-in USB C charging. However, any similar-length button top 14500 would work here, so long as you observe all series li-ion safety rules: matched cells always used together, same capacity, CDR, age, and brand. I tried two Epoch 10A and some Shockli 5A button tops and they worked just fine. Flat tops won’t work!

The T15 doesn’t have onboard charging, but the included battery pack does, which is nice. I didn’t see where it advertised charge input, but on an empty cell I saw around 430 mA and 5 volts, so around 3 watts, which is pretty slow. USB A and USB C to C both worked and charged about the same (USB A to C was a little higher, at 500 mA). 

Battery level indicator:

• None. There is visual LVP, with the main LED flashing six times every so often when the battery drops to (estimated) 3 volts under load.

Batteries	Details
Compatible batteries	14100 battery pack or 2*14500 li-ion
Incompatible batteries	Flat top 14500s
Low voltage protection/warning	Blink
Onboard Charging:
Onboard charging	No
Power bank functionality	No
USB-C to USB-C charging	Yes
Max power of USB charger (port)	18 watts
Max power measured	3 watts / 5 V 350 mA
Final battery voltage (charged)	4.18 V
Avg. onboard charge time	N/A

Lumen measurements

How Lumens are Measured: Understanding ANSI FL1 Standards How Lumens are Measured: Understanding ANSI FL1 Standards: The ANSI FL1 standards specify that output in lumens should be measured 30 seconds after turning on, as this is the standardized time for measuring brightness according to the industry standard. This is why we focus on this part in our measurements. The ANSI FL1 standards require an ambient temperature of 22 ± 3°C. We record the ambient the ambient temperature to identify potential reasons for any observed discrepancies.

Lumens are measured in my 50 cm integrating sphere with a Digi-Sense 20250-00 data logging luxmeter. The sphere has been calibrated with a Convoy S2+ measured to 260 Lumens and the figures are within 10% of actual. For the current tests, I used a Thsinde B18+ multimeter with 14 gauge wires on banana plugs in the meter, and for current over 200 mA, I use my Fy219 clamp meter with a loop of 12 gauge wire.The testing was conducted using the fully charged Weltool UB14-18 1800 mAh 14100 battery pack.

Mode	Amps at start	Specified output	Turn on	30 sec.	10 min.
Low	310 mA	250 lm	216 lm	216 lm	216 lm
High	3.17 A	1,100 lm	956 lm	891 lm	737 lm
High 2×14500	2.57 A	1,400 lm	1,263 lm	1,226 lm	693 lm

*Turn-on and 30 second measurements are done manually, while the 10-minutes readings comes from the runtime graph. This is our standard approach, though some reviewers may choose a different approach.

Ambient temperature during testing:

• 23 °C 

Parasitic drain:

• N/A µA/mA (it’s a clicky)

Weltool lists two output figures for the T15. The 1,100 Lumen figure for High using the battery pack, and a 1,400 Lumen figure when using two of Weltool’s own UB14-11 14500 cells. For Low mode, the figures are 250 and 260 Lumens. I don’t have those Weltool cells, so I used a couple of Epoch 10A 1,000 mAh 14500s instead.

Battery Life: Runtime graphs

How Runtimes are Measured: Understanding ANSI FL1 Standards About ANSI FL1 runtime standards: The runtime is measured until the light drops to 10% of its initial output (30 seconds after turning on). This does not mean that the flashlight is not usable anymore. The last column shows how long the light actually works till it shuts off. If there is a + symbol, it means that the test was stopped at that particular point, but the light was actually still running. This happens on certain occasions, with certain drivers, firmware, or batteries.

Lumens are measured in my 50 cm integrating sphere with a Digi-Sense 20250-00 data logging luxmeter. The sphere has been calibrated with a Convoy S2+ measured to 260 Lumens and the figures are within 10% of actual. I use a Digi-Sense 20250-92 data logging thermocouple for the temperature measurements. The probe is affixed to the head using tape and uses the same 5 second sampling rate for logging. I used the fully charged Weltool UB14-18 1800 mAh 14100 battery pack during the testing. I also ran the test with two Epoch 10A 1000 mAh 14500s.

Mode	Specified runtime	Runtime (ANSI FL1)	Time till shut off*
Low	4 h 5 min	3h 49 min	3h 49 min
High	1h 5 min	1h 5 min	1h 5 min
High 2×14500	45 min	45 min 50 sec	45 min 50 sec

*The last column reflects the total runtime until the light turns off. A “+” symbol indicates that the test was stopped at that point, but the light continued to run. This typically occurs with certain drivers, firmware, or battery types.

The runtimes were interesting. I was expecting fully regulated outputs across all the brightness levels and battery configurations, but surprise! High mode with the battery pack behaved like a FET driven light, with the output tracking the cell voltage.

This is a big bummer and a bit out of place on a $100 light, made worse because mostly everyone will be using the included battery pack. High with the two 14500s in series, Low with the battery back, ran properly, with fully regulated output. The runtimes? On the nose, even with my own batteries. I don’t see that with non-factory batteries, so it’s clear Weltool thoroughly tested the runtimes. 

High with the battery back came in lower than spec on the output, but maintained 900+ Lumens for about 20 seconds, and better than 800 Lumens for 5 minutes. Impressive! Unfortunately, the output isn’t regulated, and it drops slowly over the next 55 minutes until LVP kicks in and for the last 10 minutes, there’s blinks every 5 minutes until a hard shut down.

Low was much better, holding 200+ Lumens for the entirety of the 4 hr runtime, with the same LVP blinks and hard shut down. On the two 14500s, I was still coming in low for the output, but it held 1000+ Lumens for over 3 minutes and dropped to around 650-700 Lumens for the remainder of the (again, on the nose) 45 minute runtime.

Very impressive! Temps were well-managed on High mode, hitting a bit over 60 C. It was elevated on the two 14500s, but never went over 70 C, and even then I could still hold the light comfortably (thanks to the long tube). After the tests, the two 14500s read 2.8 and 3.15 volts (respectively) and the battery pack was sitting at 2.9 volts. 

For the comparison, I had to dig up some 14500 lights. The contenders were the Fenix LD22 V2 (which used a near identical battery pack), Rovyvon H3 Pro with a built-in lipo cell, and I dusted off the FWAA, Neal’s NlightD E1, and Sofirn SP10 v3 (running on a 14500). The runtimes are short, of course! The T15 holds its own, but the unregulated output on High is a major bummer.

Peak beam intensity and beam distance measurements

About Peak beam intensity: Understanding ANSI FL1 Standards About peak beam intensity The calculated value of distance in meters at which the flashlight produces a light intensity of 0.25 lux. (0.25 lux is about the brightness of a full moon shining on an object). This means that the intensity has decreased so much, it becomes difficult to see darker objects, or objects that don’t reflect light. The columns ‘Meters’ and ‘Yards’ use rounded numbers.

Beam distances are measured using a (new to me) Testo 545 luxmeter measured indoors at 5 meters using the fully charged Weltool UB14-18 1800 mAh 14100 battery pack. Measurements taken at 30 seconds.

Mode	Specified intensity	Specified beam distance	Candela measured	Meters	Yards
Low	8,700 cd	186 m	7,950 cd	178 m	195 yd
High	43,500 cd	417 m	37,125 cd	385 m	421 yd
Low 2×14500	8,800 cd	187 m	7,750 cd	176 m	192 yd
High 2×14500	54,000 cd	464 m	48,275 cd	439 m	480 yd

Ambient temperature during testing:

• 22 °C 

Weltool lists two candela and beam distance figures based on the battery choice. For two of Weltool’s own 14500s, the candela jumps to 54,000 cd and 464 meters for High, and 8,800 cd and 260 meters for Low. I used a couple of Epoch 10A 1,000 mAh 14500s to duplicate (attempt to) Weltool’s figures, but came up a little short.

Camera settings and distance: Photos taken with a Canon EOS R100 with Canon RF-S 18-45 mm STM lens. The camera is set to 0.3s, F4.5 ISO1600 and 5000K WB. The fence is 45 meters distant. For the 95 meter shot, the camera is set to 0.3s, F5 ISO16000 and 5000K WB.

Beamshots of the following flashlights compared:

• Weltool T15
• Weltool T17
• ThruNite Archer 2A V3 (2x AA NiMH)
• Rovyvon H3 Pro
• Fenix LD22 V2
• NlightD E1 SFT-25R

Please note that the following beamshots are mainly intended to showcase the beam pattern and beam quality, rather than overall performance. These images are typically taken directly after activation, and in different seasons or weather conditions, and therefore do not fully represent its overall performance. In few cases the camera settings are even different and therefore not meant for performance comparisons. For accurate performance metrics, such as output, beam distance, and runtimes, you need to look at the performance section of this review.

Disclaimer: This flashlight was sent to us for review at no cost by FlashlightGo.com. We have not been paid to review, nor have we been holding back on problems or defects.

Note: Get 10% off all flashlights at FlashlightGo with our exclusive discount coupon: 1lumen

Buy your Weltool T15 here

1lumen selects and reviews products personally. We may earn affiliate commissions through our links, which help support our testing.