Weltool M6 Dr

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Weltool-M6-dr Review

Weltool M6 Dr specifications

Brand/modelWeltool M6 Dr
LEDN/A 3000K
Max. Lumens4.5 lm
Max. Beam intensity4.5 cd
Battery config.2*AAA
Onboard chargingN/A
Review dateFebruary 2022


I’ve been accustomed to seeing Weltool’s interesting naming of their flashlights. I’m talking about the ‘nick names’ like Thunderbolt, Metal Lancer, Dragon in cloud etc.

The M6-Dr also got a nickname; Golden Eyed Tiger Cub.

Besides the M6-Dr (doctor?) there are several more options:

  • Weltool M6-UV
  • Weltool M6-RD
  • Weltool M6-BL
  • Weltool M6-Mini
  • Weltool M6

The one for review is the M6-Dr which is designed with medical professionals in mind. It has only 1 mode, and the output is really low. Weltool says it’s great for optometrists and ophthalmologists.

Package quality.

The packaging of the M6-Dr is simple but adequate. For a $20 penlight, you shouldn’t expect fancy packaging anyway. Inside the package you can find the following:

  • The flashlight: Weltool M6-Dr
  • Pocket clip (pre-attached)
  • 2AAA batteries
  • Manual

Flashlight in use

Tuck it in your breast pocket, and you’ll be good.

The M6-Dr has a pocket clip that enables you to carry it deep in your pocket. It’s interesting to note that the M6 has 3 different slots to attach the pocket clip! That’s pretty unique. By default, it’s attached to the slot closest to the tailcap. That way, the switch is located on the top, and the light source points down.

But there is also a slot located just below the tip of the light. That’s the place to carry the light the other way around, with the LED pointing upward. I’m not sure about the specific use case, but at least Weltool includes that possibility.

Then there is yet another slot, located in the middle of the battery tube. You can attach the clip in either direction. This is a great location if you want to attach it to the bill of a baseball cap. That’s pretty unique! I have never seen so many clip attachment sections on any other flashlights before.

There’s only 1 switch, located at the rear, and it’s a reverse clicky mechanical switch. You have to fully click it before you have any light. And since it has only 1 mode.. click for On, click for Off.

Build Quality, and Warranty

The tailcap/switch is removable, as well as the tip of the penlight. Both have non-anodized threads. The tip of the penlight contains the LED and driver.

This is yet another unique feature: the tip (with the LED) and the switch are interchangeable. You can put the switch in place of the light source, and vice versa. So it doesn’t matter on which end you place what. Very simple, and straightforward. And you don’t have to be afraid of damaging the flashlight by inserting the batteries the wrong way, because it has reverse-polarity protection.

Weltool’s warranty, taken directly from their website:

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.

LED, Lens, Bezel, Beam, and Reflector

This is yet another unique feature of the Weltool M6.

The light source isn’t specified with the brand and model of the emitter. It only says: warm white X-Led, color temperature (CCT) of 3000K, and color rendering index of 85%.

The beam is definitely warm and weak. It’s only 4.5 lumens according to specifications.

But the unique feature is the beam pattern. It has a smooth even beam without any rings or spill. Weltool used a unique approach with this. See the images to get a better understanding of the setup. Although, not perfect, it has a completely different beam.

The driver has a physical reverse-polarity protection. So even if you insert the batteries the wrong way, nothing will happen to the LED or driver.

  • CCT: between 3086 and 3128
  • CRI (Ra): between 95.8-96.7
  • DUV: between -0.0018 and -0.0025

This means that the beam is pretty warm, and high CRI.

Dimensions and size comparison

  • Length: 131.4 mm / 5.17 ”
  • Diameter: 14.3 mm / 0.563 ”
  • Body diameter: 14.4 mm / 0.567 ”


  • Empty: 24.8 g / 0.87 oz
  • With 2 Eneloop batteries: 48.7 g / 1.72 oz

Penlight comparison

Size compared to other great penlight flashlights

Image 1, from left to right: Wuben E19, Acebeam PT10-GT, Olight i3T Plus, Weltool M6-Dr , Nitecore MT06MD, Wurkkos WK02, Lumintop IYP365.

Driver & User Interface:

You can probably skip this part of the review, since it’s pretty boring.

Available modes:

  • 1

From OFF:

  • Single-click: on

From ON:

  • Single-click: off

Mode memory:

  • yes, lol

Blinky modes menu:

  • None

Low battery warning:

  • None

Lock-out mode:

  • No


  • None

Batteries & Charging

Weltool included 2 Alkaline AAA batteries, pre-installed. The good thing about disposable Alkaline batteries is they can be discharged very deep, and with such low-current applications, they do have some benefits.

But the biggest drawback of Alkalines is they leak. If you keep them in a device for too long (months or years) they will leak eventually, damaging your flashlight. And because of that, I try to stay away from using Alkalines as the main power source for flashlights.

I recommend using rechargeable batteries like Panasonic Eneloop instead.

The only problem with these flashlights is: they don’t have a low voltage protection. This means, that rechargeable batteries are discharged too deep. This means that they can damage as well.

If you use the flashlight on a daily basis, alkaline batteries are okay to be used. Why?

Because the LED only draws a very small amount of current. The batteries have no time to corrode, because you’ll find out soon enough. You don’t have to care too much about deep discharging alkaline batteries.


Lumen measurements:

All output numbers are relative to my homemade Integrating Sphere. It is set up with an Extech SDL400 Lux Meter for measurements including a Kenko PRO1D ND-16 filter. The base measurement is done with a Convoy S2+ that has been tested at 255 lumens.

For Amp readings, I use a Fluke 77III DMM. For higher amps I now use a Fluke 325 True RMS clamp meter. For microamps, I use a cheap DMM with an easy-to-use micro amp setting.

All of my readings were taken from fully-charged Panasonic Eneloop AAA batteries.

Specs@ start30 sec10 min
4.5 lumens5.024.99 lm5 lm


The runtime test was done with the 50cm integrating sphere, including the Kenko Pro1D ND-16 filter and Extech SDL400 data logging Lux Meter.

Total runtime is about 8.5 hours on 2 AAA Eneloop batteries. I do not recommend letting it run till it dies, because the batteries were discharged too deeply.

Throw Measurement

Measurements were taken indoors at 2 meters with a professional Hagner E4-X Lux Meter.

Cd measuredThrow in MetersThrow in Yards
14 cd7 m8.18 yd

You can see that the actual throw is very low. Great for medical purposes, not so great for anything else.


There is no way to do normal beamshots so here are a few shots on close distance.

Disclaimer: This flashlight was sent to me for review at no cost by Weltool. I have not been paid to review, nor have I been holding back on problems or defects.

Final Verdict


  1. 3 unique slots for attaching pocket clip
  2. Switch and tip of light are interchangeable (using the same threading)
  3. Simplest UI possible: 1 mode
  4. 100% dedicated light for certain tasks
  5. Unique even beam without rings or hotspot


  1. Only 1 mode?
  2. No low voltage protection for rechargeable NiMH batteries

Explanation on star ratings:

1: Avoid: my phone flashlight would be a better choice – 2: Poor: significant defect or issues; almost unusable – 3: Average: some defects or issues; but still usable 4: Good: recommended (minor issues) – 5: Great: highly recommended

Reviewer Marco
Author: Marco

5 stars: ★★★★★

Penlights usually have a specific use case in mind, and the Weltool M6-Dr penlight definitely only has 1. With only a single (low) mode, warm tint, and specific shape and style, it’s clearly meant to be used by medical professionals. The beam is probably too weak for almost any other use case.

If you’re looking for a nice single-mode penlight with warm white LED, and high CRI, look no further. This is the one you are looking for.

Weltool M6-Dr For Sale

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