Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp

Model: miln211121
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Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp Model: miln211121

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
Power Source
UL Safety
CSA Safety
Bulb Type
Batteries Included
Battery Type
Case Included
Bluetooth Compatibility
Battery Amp Hour
2.5 Ah
No. of Bulbs Required
Charge Time
2 Hours
Charger Included
ETL Safety
3.76 in.
2.21 in.
1.53 in.
0.41 lbs.
Warranty Term

Reviews :

3.6 / 5.0
38 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend this product?
Yes (7)
No (1)
Easy To Use (8)
Powerful (8)
Battery Longevity (if applicable) (2)
Lightweight (2)
Heavy (5)
Short Run Time (if applicable) (2)
Best Uses
Frequent Use (6)
Jobsite (4)
Small Projects (3)
Heavy Duty Requirements (2)
Worked great til it didn't
The different light modes are great, super bright, battery will last a day or two depending on use, maybe more, but recently it started flashing red and green while charging and now it no longer charges, for $70 I expected a lot better
October 9, 2020
Originally posted at
Headlight was awesome and then...
I purchased this headlight 6 months ago and it came with 2 batteries. At first it was great and put off more light than my peers headlights. Then slowly the battery life was shorter and shorter to where now both batteries are flashing green and red when I try to charge. I have many other Milwaukee products and batteries that have lasted years. For the price I paid for this product I feel like you are not really getting your money’s worth. If you can find a different light that does the same at a different price you may want to consider purchasing it instead.
October 5, 2020
Originally posted at
would think twice before buying again
Bought my headlamp new and use it quite often. Gone through 2 batteries in 6 months. The strap is stretched out to the point of no more adjustment. I have sent 2 requests via "contact us" on Milwaukee's website for info on how to replace my strap with no response.
September 25, 2020
Originally posted at
Lovely Product but the life of the battery not so
It is very bright and powerful, love to use it at work, but for so many months now the battery does off
September 21, 2020
Originally posted at
Battery Defective
Light worked great when first bought. Now after about 20 charges it will not charge at all. It just flashes green and red. For as much as I spent on this product I would have loved it to last longer. Expected mor from a Milwaukee.
September 5, 2020
Originally posted at
Great at first. Now flashing light of doom
I bought this product because of profession of needing light while working. It worked great for a couple of months.... then flashing green/red light of doom. Not only that but the light itself sometimes strobes. I tried taking the battery out and cleaning the terminals. It worked well for about another week... then it happened again and again. Light will last about 5 minutes on lowest setting.
August 20, 2020
Originally posted at
Would you recommend this product?
Easy To Use
Battery Longevity (if applicable)
Great headlamp light. Really bright and does the job.
August 6, 2020
4 months ago
Describe Yourself:
I wouldn't buy this product again
Just like most reviews my light started flashing red and green after only little use
July 13, 2020
Originally posted at
I would not buy this product again
I love this this headlamp since I work night shifts I need it a lot. As I looked at the reviews I seem to the have the same problem most of us have with green and red light flashing over and over again before completely dying on me. Battery doesnt last me throughout the night. So yeah, looks like ill have to get a new battery soon see if the fixes my problem.
July 8, 2020
Originally posted at
Would you recommend this product?
Best Uses
Frequent Use
Better for hardhats but possible to use on your head
I did not realize this was mainly for hardhats, I’m sure it works really well like that, I have been using it with a lighter band on my bare head and it does pretty good, it’s heavy but not terrible and it’s very bright
July 1, 2020
6 months ago
Describe Yourself:
Avid Do-it-Yourselfer

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.