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Weltool W4 LEP Flashlight

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Original price $ 306.00 - Original price $ 314.49
Original price
$ 306.00
$ 306.00 - $ 314.49
Current price $ 306.00
Include -W4 White Diffuser: Do not include diffuser

Free shipping for orders over $75. Any order containing lithium batteries is at risk of abnormal shipping delays. UPS is highly recommended for orders containing batteries.

by Weltool

Weltool W4 LEP Flashlight ( Cool White )

The W4 LEP flashlight has a beam of up to 2.6 kilometers, 560 lumens, light intensity reaches 1782000 candela, uses one 21700 rechargeable lithium-ion battery, high-quality drive circuit with temperature control, constant current drive, and ensure that the flashlight will not overheat. W4's LEP light source has high energy density and then passes through a special lens reflection system to form a dazzling light column. High and low brightness modes are adjustable, simple, and practical.

    In the off state, only half-press the switch to turn on the highlight, and it is equipped with a stainless steel bezel for tactical use. The W4 spotlight has almost no floodlight, concentrated light, and significant spotlight effect. It is suitable for field search, sea rescue, long-distance indication, etc. It is designed for special lighting.

A spare Weltool UB21-50 21700 USB Rechargeable Li-ion battery can be purchased here.

The optional White Diffuser can be found here. It also provides protection to the front lens when not in use. It is highly recommended!


  • First, unscrew the flashlight tail cap counterclockwise, the battery positive electrode is inserted toward the head, and tighten the tail cap clockwise.
  • The flashlight has the positive and negative pole reverse connection protection function, even if you install the battery in the wrong direction, the flashlight will not be damaged, but it will not work, please check the battery at this time
  • Half-press the tail switch button once, the flashlight starts working (high mode), and the flashlight stops working when the switch is released
  • After half-pressing the flashlight to start working, immediately release it and then half-press the tail switch again, the brightness mode is switched to low brightness, and the operation is repeated in this way and the mode cycles. Press the switch hard in any mode, there will be a "click" sound, lock the current brightness is always bright; press again, the switch will have a "click" sound, the flashlight is turned off.
  • When the battery power is low, the flashlight light flashes, even if you focus on your work, you will also see the light prompt. Please replace the battery in time.
    • This listing is for the cool white version.
    • Unauthorized disassembly may damage the light and void the warranty
    • The light will increase in surface heat during use, recommended use is outdoors in a well-ventilated area with ambient temperature under 25 degrees Celsius and the wind speed exceeds 5m/s.  When the light is uncomfortable to hold due to increased heat, please turn the light off until it cools down.  If used indoors, it is recommended to be used for no more than 10 minutes each time and allow the light to cool down between uses.
    • Please swap out the O-rings regularly to maintain the water-resistance level
    • Lubricate the threads with professional-grade lubricant regularly
    • Maintain and keep clean any contact surfaces of the flashlight with an alcohol swab.  This may prevent irregular flashes during use.  
    • Remove batteries during storage.  Keep lithium-ion batteries charged approximately every 4 months
    • This flashlight may not be used as a diving light
    • Do not aim this light directly at eyes or exposed skin to prevent injuries
    • Keep this flashlight out of the reach of children.

      This light uses a high-efficiency LEP emitter, with power output between 0.22 – 0.25W, classified as a Type IIIb laser device.  Please use it in accordance with applicable laws and regulations. By using this device, you certify you have read the included “Laser Safety” warnings and release the manufacturer and retailers from all liabilities.
      The tail cap acts as a “safety key” and must be kept safe.  The tail cap switch can shut off the light immediately or by twisting off the tail cap as a safety back-up.  
      DO NOT aim at another person.  DO NOT aim at mirrors, glasses, or other reflective surfaces.  DO NOT aim at aircraft or vehicles in operation.

      • This listing is for the cool white version.
      • Material: Aluminum alloy, black hard anodized surface
      • Reflective system: Acrylic lens
      • Light source: special LEP module, wavelength 400-700nm, lifespan about 10,000 hours
      • Output :
      • HIGHT LOW
        LUMENS 560 187
        INTENSITY 1782000cd 603000cd
        DISTANCE 2607m 1553m
        RUNTIME 1h58min 4h32min
      • (Tested with Weltool UB21-50 5000mAh 21700 rechargeable lithium-ion battery, outdoor, constant on, below 25 degrees Celsius)
      • Battery: Use one 21700 li-ion rechargeable battery ( Battery is included )
      • Switch: Tail tactical switch, 50,000 press life
      • 304# stainless steel bezel, double-coated tempered glass lens
      • High efficiency constant current drive circuit, no noise, and no PWM
      • Temperature control protection: when the flashlight temperature is too high, the flashlight will automatically reduce the brightness to prevent overheating
      • Reverse polarity protection
      • Low voltage prompt function
      • Battery over-discharge protection
      • Coated tempered glass lens 
      • Passed 1-meter drop test
      • Double O-ring waterproof, protection grade up to IP67
      • Each flashlight has a unique serial number
      • Size (±0.5mm): (head diameter) 60.5mm, (body diameter) 27mm, (length) 193mm
      • Weight: 332.8±0.5g (without battery)
      • Included: UB21-50 lithium-ion battery, Type-C charging data cable, waterproof ring, stainless steel pocket clip
      This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer, birth defects, or other reproductive harm.

Customer Reviews

Based on 29 reviews
John E.
Magic flashlight part two

I was sitting in my backyard at night
With my Family all the light out
I pulled my W4 out of my pocket and pointed it up in the air everyone went silent they could not believe that this small Flashlight could make the narrow beam that far into the night sky especially when large owl flew over about 600 feet above it lit up the owls under side so bright we watched it fly across the sky it was incredible.

Everything is AWESOME

Since i was a kid, been loving any kinds of light especially flashlights. I've been wishing to reach the clouds with a handheld torch and here it is thanks to Killzone flashlight for making my wish come true, now i can finally reach and play in clouds with my "DRAGON IN CLOUDS" WELTOOL W4 my first ever LEP flashlight my light saber (look who's happy now) 😁 and it is AWESOME it can throw 2670+m for a long period of time. To all the flashlight enthusiasts out there to the flashaholic like me i know you can feel me LOL I recommend this to you and to everybody. Please don't forget to include the difuser better to protect the lense and it will be more usable. And of course before i finally finish this review, i would like to thank the person behind the killzone flashlight, the owner Ms. Jody McCarty she's very kind and very patient in assisting me. Thank you so much.. My over all ratings to the weltool w4 is 5 star and same with the killzone flashlight online store and to their services and the shipping also arrives earlier than the schedule. Exceeds my expectations. Kudos!

Linc W.
Just as good as acebeam w30

I was disappointed when I could not purchase acebeam w30 anymore. However after the research th Weltool W4 Is exactly what I was looking for..... quality built worth every penny and oh yeah BRIGHT as heck...

Jimmy S.
Better than expected 👌

Very satisfied with the weltool w4. I would definitely recommend this flashlight and Killzone for that very matter.

Michael M.
Unbelievable service and product

I chose to get a notification on the website to tell me when they got this back in stock and upon ordering it I received it less than 24 hours later! The service that they provide is unmatched and the product is by far the best I have in my flashlight collection. If you’re addicted to kick *ss flashlights you have to have this one.

Daniel S.
Fun light saber!

The quality seems nice, and it's fun to out-throw all your friends, but it has limited practical usage. Doesn't really get too hot, and the diffuser makes it more viable in close quarters, but becomes a huge torch for a little diffused light.

The best thrower

I have been collecting flashlights and the Weltool W4 is the best thrower I have so far...the beam is so narrow and focus which push the light over 1.5 miles away...another positive about this LEP flashlight is the size is not as big heavy as other brands.
I’m very happy that I’ve found shipping and handling are top notch and the owner Jody is so friendly... I know that I will come back here very often.

Stephen R.
Like a friggin' lightsaber!

I've never seen a flashlight before with such a laser-like beam. It's the size of a regular flashlight, but reaches out almost 3 kilometers to touch distant objects with its brilliant light. This thing is not a toy, so keep it away from children. If you are a flashaholic like me, then the W4 is a must for your collection.

Thomas E.
Signal another planet.

I watched reviews of the Weltool W4, on YouTube, but you just can't really appreciate this lights throw until you fire it up yourself, in person! Whoa! Pretty sure that I accidentally signaled the Mars rover! Sorry NASA! Seriously though, if you are looking for a compact, mega-throw, death ray, for very special purposes, search no more! The diffuser cap is a 'MUST', and turns this light saber into an actual useable source of light for real situations. Awesome job Weltool, keep up the great work!

Juan R.
Most anticipated

Had been 'saving up' for this one, and it didn't let down. It is a very specific flashlight though. But what an amazing feat of engineering to hold in your hands.