Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp

Model: miln211121
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Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp Model: miln211121
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Product Features & specs :

Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp

High Output. Secure Attachment. Powered by REDLITHIUM USB, the Milwaukee USB Rechargeable Hard Hat Headlamp delivers 475 lumens of TRUEVIEW High Definition output, and is capable of all-day runtime, over 2,000 recharges and 3X faster charging via USB. Optimized for use with hard hats, its slip resistant strap and clips provide easy and secure attachment. A water, dust and drop resistant body and lens allows 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 31 hours of runtime. The REDLITHIUM USB Battery can be recharged in the light 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
  • Flood, Spot and Spot/Flood Beam Pattern Options
  • 5 Light Output Modes for Optimal Brightness and Runtime
  • Spot/Flood Mode: 475 Lumens- 2 Hrs. Flood High Mode: 300 Lumens- 4.5 Hrs. Flood Medium Mode: 150 Lumens- 8.5 Hrs. Flood Low Mode: 25 Lumens- 31 Hrs. Spot High Mode: 300 Lumens- 4 Hrs.
  • 7-Position Tilting Light Head for Directing Light
  • Internally Charges REDLITHIUM USB Batteries through Micro-USB Port
  • 3X Faster Charge Time: 2.1A Charge Rate
  • Get 50% of a Charge in Under 30 Minutes, 80% in Under 1 Hour, and a Full Charge of the REDLITHIUM USB Battery in 2 Hours
What’s Included:
  • USB Rechargeable Hard Hat Headlamp - 2111-21
  • REDLITHIUM USB Battery - 48-11-2130
  • 2 ft. Heavy Duty Micro-USB Cable
  • (4) Removable Hard Hat Clips
3.76 in.
2.21 in.
1.53 in.
0.41 lbs.
Batteries Included
Battery Amp Hour
2.5 Ah
Battery Type
Bluetooth Compatibility
Bulb Type
CSA Safety
Case Included
Charge Time
2 Hours
Charger Included
ETL Safety
No. of Bulbs Required
Power Source
UL Safety

Reviews :

4.2 / 5.0
21 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend this product?
Yes (5)
No (1)
Easy To Use (7)
Powerful (7)
Lightweight (2)
Ergonomic Design (1)
Heavy (4)
Short Run Time (if applicable) (2)
Best Uses
Frequent Use (5)
Jobsite (4)
Small Projects (3)
Heavy Duty Requirements (2)
Love this product
Best headlamp I’ve had, works great, stays charged and lasts me more than 2 days if I’m using it all day
February 6, 2020
Originally posted at
Great product but believe my battery is defective
I am a plumber and use this as a regular head lamp on a backwards hat.
January 23, 2020
Originally posted at
Better bracket needed or a replacement parts list
Light is brilliant very bright & light weight, only down fall is the bracket which didn't withstand being knocked whilst on my hard hat.
January 3, 2020
Originally posted at
Best hard hat lamp ever
Color, output, ruggedness, all great! Recharge rate is pretty fast. Only problem I seem to have is the weight of the device. It pulls my hard hat down a bit in the front. Other than that its a great product
October 26, 2019
Originally posted at
Would you recommend this product?
Easy To Use
Short Run Time (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
Super bright, best headlight ive found with typical awesome Milwaukee quality!!
I purchased this headlight as being a high voltage lineman, i work at night all the time, and typically its really dark because the power is out. We also need as much light as possible to work safely as we are regularly within arms reach of hard to see small wire that if we touch it, it can easily kill us. I have tried at least 8 different lights, and i finally found the best one. Bright enough and wide enough. The only complaint i could find is battery life while on the 2 brightest modes. Maybe 2 to 3 hours, so a second battery and a seperate way to charge is required as i work shifts that start before sundown and last well into the next day. I have yet to find any store that stocks the battery and/or charger so it has to be ordered. I currently stole the battery from one of my other flashlights so now i can go all night as long as i keep the light on the 2 lowest settings most of the time. I previously purchased the smaller Milwaukee headlamp that takes 3 AAA batteries as i didnt know this one even existed, but for my type of work that lamp didnt have nearly a strong enough spotlight. Just a very wide floodlight that is only bright enough for me for the first 30 minutes of battery life. Basically i had to put 3 new AAA's in it every 2 to 3 hours, so that light is now my backup for when im out of juice for this one. The only other thing i noticed that i dont like is the strap has stretched out considerably, so the only way i can keep it on my hard hat when i bend over is to just wrap 3 or 4 layers of e-tape around the strap/hard hat and i just leave it on the hat full time. All in all, i like the light so much, and its so much better than every other one ive tried, that it still gets 5 stars all the way.
October 10, 2019
Describe Yourself:
Use It Often, Reliable, Several Light Levels
I use this headlamp for work as well as around the house when walking to my detached garage, fixing plumping under the sink, finding tripped breakers in the electrical box, etc. I like that it fits on my hardhat or can be used without a hardhat by simply putting the strap around my head. This headlamp was recommended by the counter person at my local electrical supply distributor. These guys typically know what works, what doesn't.

This headlamp has seven light levels, flood or spot modes. I find all of them useful depending on the task at hand. The low and medium level flood modes are great for working in electrical panels where you just need a little extra light. The low level dramatically increases battery life. I use the spot mode when walking to my garage or through dark warehouses.

The USB battery is replaceable. I've read where others keep a spare and swap it out as needed. I'm not sure how to charge a spare outside of the headlamp.
September 21, 2019
Originally posted at
What's up with the battery problem?
I use my Milwaukee headlight at least 2x a week. Im getting the same problem I seen others commenting on with the battery. My light after charging it for an hour will blink then turn off. When I plug it in the indicator light will flash green then red a few times. I haven't even had my light 3 months. I would definitely hold of on buying this light until they figure out the battery problem. I do have to say other then the battery problem it's a great light.
September 13, 2019
Originally posted at
Would you recommend this product?
Easy To Use
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Super bright. Versatile lighting modes. Rechargeable a major plus. Size and weight need work.
Super Bright. Nice selection of modes. Good “hardware” for attaching to a hard hat. Rechargeable is a big plus.

Size and weight. It’s like wearing an off-road light bar on your head. Def feel the extra weight on the hat. Just huge looking when installed.

Should def have made the battery box separate like other head lamps. Light in front with the battery in back. Would be a lot smaller lamp area and a better weight balance.

Overall I like it, but I wouldn’t buy it again until it gets redesigned.
September 5, 2019
Describe Yourself:
Would not purchase again
Only have 1 week with the headlamp and it only last me 5 hours, I'm a low Voltage technician and my current job site has no lights so having a headlamp is a must.
August 28, 2019
Originally posted at
Im really happy with the 5 ive bought so far
Ive buying them slowly for the plant employees where i work. Each time one of the old ones break i replace it with one of these and an additional battery/ charger kit. So when any one of the plant guys lights needs a battery they just swap it with one in a charger. Most of the guys use it on high so they battery life is kind of short but thats expected and why i bought the spares. Still they only have to swap batteries every couple days. With a 2000 cycle life span frequent swapping wont be an issue for a long time.
As for function, I use mine as a mobile work light and headlamp. You can remove it from its plastic mount and sit it where you need it. Im not sure if its meant to be that way but im careful and its worked perfectly at least 100 times. Its been about 9 months to a year since i bought mine (the first one at the plant and i still havent found any major flaws. One weak point is the battery life if used on high flood (approximately 2 hours) all of the time. My resolution is the spare battery and charger kit which is fully charged in that amount of time. So i dont see that as much of a weak point. just get the kit and you have a great work light for around $100.
May 3, 2019
Originally posted at

Q & A :

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Browse 12 questions Browse 12 questions and 14 answers
Can the headlamp be worn comfortably without using it with a hardhat?
James G on Dec 8, 2017
BEST ANSWER: Yes, It is very comfortable. I do not use a hard hat.
Can I use it without hard hat?
A shopper on Nov 13, 2017
BEST ANSWER: Yes you can use it with hard hat
can i get additional battery?
A shopper on Jan 30, 2018
BEST ANSWER: Yes batteries are sold separately.
Once a mode is selected, can the light be turned on and off without cycling through other modes?
A shopper on Dec 31, 2018
BEST ANSWER: Yes, you can turn off the light without cycling through modes.
How do I get a free replacement due to the fact lamp never worked? It was a gift
Nelson G on Oct 17, 2019
BEST ANSWER: Please contact Milwaukee directly at 1-800-729-3878. The agent will be able to assist you with the warranty replacement.
Does the battery go bad and have to be replaced?
A shopper on Aug 25, 2019
BEST ANSWER: Your question will be best answered by the manufacturer, who can provide you with the accurate information. The number to reach the technician is 1-800-729-3878.
Are they intrinsically safe?
Francisco C on May 14, 2019
BEST ANSWER: Your question will be best answered by the manufacturer, who can provide you with the accurate information. The number to reach the technician is 1-800-729-3878.
Do you charge the battery in the light itself or is there a external charger for the battery?
MikeR on Jan 27, 2019
BEST ANSWER: Model 2111-21 internally charges the REDLITHIUM USB Batteries through Micro-USB Port.
Can we get replacement strap?
Pinoydad on Jan 17, 2019
BEST ANSWER: Yes, the model number for the replacement straps are 45-56-0085.
Can this be used with a full brim hard hat as well?
A shopper on Oct 7, 2018
BEST ANSWER: Yes, the item has a Rubber Grip for Secure Hard Hat Attachment.