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Model #2111-21

Store SKU #1002583484

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475 Lumens LED REDLITHIUM USB Hard Hat Headlamp

  • 475 Lumens of TRUEVIEW high definition output
  • Clips and rubber grip for secure hard hat attachment
  • IP54 Rated: water and dust resistant
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Product Overview

The MILWAUKEE REDLITHIUM USB Hard Hat Headlamp offers users high output, secure attachment and is powered by REDLITHIUM USB. The hard hat light delivers professional users 475 lumens of TRUEVIEW High Definition Output and is capable of all-day runtime, more recharges, and 3X faster charging via USB. It is optimized for use with hard hats with its slip-resistant strap and clips for easy and secure attachment. The water, dust, and drop resistant body and lens allow it to withstand the toughest conditions. Get maximum control over output, beam coverage, and runtime with five different modes, flood, spot and spot/flood beam patterns, and up to 33 hours of runtime. The REDLITHIUM USB Hard Hat Headlamp is powered by the REDLITHIUM USB 3.0AH Battery, providing all-day run-time, more recharges, and 3x faster charge time. The Milwaukee REDLITHIUM USB Battery can be recharged in the flashlight via Micro USB or swapped out with additional REDLITHIUM USB Batteries for virtually no downtime. The Milwaukee USB Rechargeable Hard Hat Headlamp is covered by a limited lifetime warranty.
  • 475 Lumens of TRUEVIEW High Definition Output
  • Clips and Rubber Grip for Secure Hard Hat Attachment
  • IP54 Rated: Water and Dust Resistant
  • 5 Light Output Modes for Optimal Brightness and Runtime
  • Flood, Spot and Spot/Flood Beam Pattern Options
  • 7-Position Tilting Light Head for Directing Light
  • Spot/Flood Mode: 475 Lumens- 2.25 Hrs. Flood High Mode: 300 Lumens- 5 Hrs. Flood Medium Mode: 150 Lumens- 9 Hrs. Flood Low Mode: 100 Lumens- 33 Hrs. Spot High Mode: 300 Lumens- 4.5 Hrs.
  • 50% Charge in Under 30 Minutes or a Full Charge in 2 Hours
  • LED Fuel Gauge Allows Fast Checking of REDLITHIUM USB Battery Charge
  • Internally Charges REDLITHIUM USB Batteries through Micro-USB Port
  • 2ft Heavy Duty Micro-USB Braided Cord with Metal Ends
  • Limited Lifetime Warranty on Light, 2 Year Warranty on REDLITHIUM USB 3.0AH Battery
  • Includes: (1) REDLITHIUM USB Hard Hat Headlamp (2111-21), (1) REDLITHIUM USB 3.0AH Battery (48-11-2131), (4) Hard Hat Clips, (1) 2ft Heavy Duty USB Cord
  • Includes: hard hat headlamp, REDLITHIUM USB, USB charger

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Info & Guides

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Save $40.94 (29%)
IncludedBatteriesNo additional components or accessories are includedBatteriesBatteries
Casing materialAluminumAluminumAluminumAluminum
Flashlight typeHeadlampHeadlampCombination PackHeadlamp
Flashlight FeaturesAdjustable Head Strap,High/Low Switch,Impact Resistant,Pivoting LightAdjustable Head Strap,Hard Hat Compatible,High/Low Switch,Impact Resistant,RechargeableHigh/Low Switch,Impact Resistant,Pivoting Light,Rechargeable,USB Device Charger,WaterproofAdjustable Head Strap,High/Low Switch,Impact Resistant,Pivoting Light,Rechargeable
Battery SizeAAA BatteryLithium-Ion Battery PackLithium-Ion Battery PackLithium-Ion Battery Pack
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Product Depth (in.)
3.76 in
Product Height (in.)
1.53 in
Product Length (in.)
3.76 in
Product Width (in.)
2.21 in


Battery Life (hours)
31 h
Battery Size
Lithium-Ion Battery Pack
Bulb Type
Casing material
Color Family
Color Family
Flashlight Features
Adjustable Head Strap,Hard Hat Compatible,High/Low Switch,Impact Resistant,Rechargeable
Flashlight type
Hardware Color Family
No additional components or accessories are included
Battery,Charging Cable
Light Mode
Number of Batteries Required
Package Quantity
Power Source
Product Weight (lb.)
.34 lb
Protective Features
Impact Resistant,Water Resistant
Safety & Security Product Type
Flashlights & Accessories

Warranty / Certifications

Manufacturer Warranty
Light and LED Limited Lifetime Warranty. Two year warranty on REDLITHIUM USB Battery

Questions & Answers

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Customer Reviews

  • 4.2
    out of 910 reviews
  • 61%recommend this product
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Showing 1-10 of 910 reviews
Good helmet Light
I work in heavy industry and have had this light in the field for about a year, other than having to replace the batteries with the new 3.0 it has been great. Honestly they shouldn't even sell the original batteries anymore they don't last a day most of the time. its performed well in high heat as well as low temps for long periods. has taken a pretty good beaten and has never failed me, just ordered the newest version, the rechargeable magnetic light. hopefully last as well as this one has.
    • Recommended
    Older design and needs an update for BOLT mount
    Using this with my Milwaukee hardhat on new civil construction (Airport) project right now. Does well to reach dark areas with all the different light profiles. I still get confused on getting to the right lightning mode but it does the current job. Rechargeable batteries are great compared to the AA/AAA battery options, which drain too quickly. Sadly this does not mount up with the Bolt Hardhat mount due to the fact the strap does not come off the mount. I don't think there's a separate mounting solution available from Milwaukee to allow for it to use the bolt headlight mount. My only choice would be to cut the strap to use with my Milwaukee hardhat. The current strap mounting solution does fail when in tight spots and gets caught on various things. Would love to see this mounted to the bolt mount somehow. Milwaukee should highlight it does NOT work with the BOLT mount.
      Weak Latch Design
      Latch broke off, left with paperweight. Great light otherwise, especially with a second battery and charger.
      Response from Customer ServiceSep 16, 2021
      Hi Derek, we are sorry to hear about your latch on the USB Rechargeable Hard Hat Headlamp. We will contact you via email for more information. -Cayla with Milwaukee Tool
        Disappointed In Life Span
        I purchased this product brand new from home depot. While it worked it was amazing to use. However after only a month of use and recharging approximately once every day I got the defective battery indication. The light flashs red and green. I really enjoy Milwaukee tools but am highly disappointed by the service life of this product.
        Response from Customer ServiceSep 9, 2021
        HI Scott! Thank you for telling us about your experience with the USB Rechargeable Hard Hat Headlamp. We would like some additional information so we can better assist. We will contact you through email.- Cayla with Milwaukee Tool
          Really disappointed in battery life
          I purchased this headlamp just over a year ago and for a while it worked great, charge it once a week and that would cover me for the use I needed first thing in the morning at my workplace. For the last couple of months the battery life has dramatically reduced to the point where when I plug in the headlamp to charge it it now flashes red and green and gives barely any time with the light on. I own a lot of Milwaukee tools and this is the only one where I have really encountered an issue
          Response from Customer ServiceSep 8, 2021
          Thank you for your feedback! We are sorry to hear that you have been having difficulties with your USB Rechargeable Hard Hat Headlamp. We will send you an email to get some additional information to learn more about your experience. -Cayla with Milwaukee Tool
            Battery life is too short
            Hi. My name is Tae. I bought this head lamp and I changed this light about 30time and led starts red and green which mean is battery life is end. I ensured I need to charge two times a day but the rechargeable battery life is too short.
            Response from Customer ServiceAug 4, 2021
            Hello Taekim! Thank you for posting a review. We are sorry your experience with the USB Rechargeable Hard Hat Headlamp has not lived up to our usual standard. We will contact you via email to assist. -Cayla with Milwaukee Tool
              I would not buy again
              Only charged a couple times now the headlamp charge light flashed red and green indicating faulty batteries very disappointed as i really like Milwaukee tools
              Response from Social MediaJul 6, 2021
              Hello Kendawg! We are very sorry to hear that our USB Rechargeable Hard Hat Headlamp hasn't been performing to your expectations. We will be in contact shortly to provide further assistance. Thanks- Will with Milwaukee Tool
                It was great at first..and then it wouldn't charge
                I bought this headlamp not too long ago to use only at work and use my black diamond (of 3 years now) headlamp purely for camping.. well after maybe 8 charges, the headlamp stopped charging up. Only flashes red and green. It was very good when I first got it but it's unreliable. Very unfortunate because I did really like the headlamp.
                Response from Customer ServiceJun 25, 2021
                Hi Markusmoo, Thank you for takingthe time to give feedback on the USB Rechargeble Hard Hat Headlamp. We are sorry to hear about the issues with charging. We will contact you via email in order to better assist you.- Cayla from Milwaukee Tool
                  Do not recommend
                  Battery only lasted max 30 charges but by that time it was already decreasing the time you can use and brightness not in highest setting
                  Response from MarketingJun 9, 2021
                  Hello, we apologize for this frustrating experience with the USB Rechargeable Hard Hat Headlamp. Our team will reach out shortly to provide assistance. Thank you - Hannah from Milwaukee Tool
                    Just what you would expect from Milwaukee
                    I often work nights restoring power in emergency situations and this light works longer hours than me(16 hour days) and still holds a charge. I've put it in the harshest environments including sub-zero weather, snow, rain & high humidity 100+ degree temperatures and it still holding up re
                      • Recommended
                      Showing 1-10 of 910 reviews