Model#: MILN211121

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Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp

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  • Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp
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Product Overview


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
  • 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


Cordless: Yes
Battery Included: (1) REDLITHIUM USB 2.5Ah
Battery Warranty: 2 Year Limited Warranty
Flood Mode (High): 300 Lumens / 4.5 Hrs.
Flood Mode (Low): 25 Lumens / 31 Hrs.
Flood Mode (Medium): 150 Lumens / 8.5 Hrs.
Ingress Rating: IP54
Spot Mode (High): 300 Lumens / 4 Hrs.
Spot/Flood Mode: 475 Lumens / 2 Hrs.
Tilt Positions: 7
Tool Warranty: Limited Lifetime Warranty
USB Charge Rate: 2.1A
Voltage: 4V
Battery System: REDLITHIUM USB



4.7 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (3)
Easy To Use (4)
Powerful (4)
Ergonomic Design (1)
Lightweight (1)
Heavy (3)
Short Run Time (if applicable) (1)
Best Uses
Frequent Use (2)
Jobsite (2)
Large Projects (1)
Small Projects (1)
Yes, I would recommend this to a friend
Easy To Use
Short Run Time (if applicable)
Best Uses
Small Projects
Although I would recommend this device with reservations, the battery like is lacking severely and is bulky,
March 13, 2019
2 weeks ago
Describe Yourself:
I work at night
I’m a miner! Thank you Milwaukee for getting this one right .
January 20, 2019
Originally posted at
Deffinantly worth the buy.
I have been using this light for all my mechanic work on semi's. I work over 12 hour shifts most of the time and the only down fall is not having a spare battery for when I need it. I wish Milwaukee would make a external charger and sell on with 2 batteries so you can always keep working. Other than that, i would recomend anyone this light.
January 16, 2019
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Works well...bright and easy to recharge
December 30, 2018
3 months ago
Describe Yourself:
Super bright. great features
very easy to use, only 2 buttons.

one button is on/off. the other changes the mode.
if its flashing at you that means the battery is low which is a great feature,
on the bottom by the charger itll have green/orange/red for the first couple seconds you turn it on so you know how much life is left.

really wide angle on the flood settings.

would recommend, i even wear it straight on my head without the hardhat, its not too uncomfortable, maybe just put a toque or headband underneath if you need.
November 17, 2018
Originally posted at
great light. Simple, bright and sturdy
Great amount of light and easily adjustable settings.
Really like the rechargability.
...and would LOVE Milwaukee to include a peel and stick neoprene pad for non-hardhat users! Still, excellent unit.
November 16, 2018
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Frequent Use
Large Projects
Perfect headlamp good light
September 11, 2018
6 months ago
All the light I need....
This light goes where no light I've ever owned has gone before. Super bright with many modes to choose from and a sensible rechargeable system. Doesn't have to be mounted on a hard hat but feel fine on a bare head too. I'm very impressed with this product.
August 21, 2018
Originally posted at
Easy To Use
Ergonomic Design
Best Uses
Frequent Use
Milwaukee 2111-21 USB Rechargeable Hard Hat Headlamp
I have used headlamps for nearly 10 years and find this to be extremely good for the price.

No more AA or AAA batteries to purchase and the provided head strap is well made. They even provide Cleats to mount on to your hard hat.

The battery provided seems to be working well also.
May 13, 2018
Describe Yourself:

Questions & Answers

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Browse 9 questions Browse 9 questions and 11 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.
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.
Is it intrinsically safe?
A shopper on Jan 12, 2018
can this lamp be used without a hardhat?
asher l on Dec 7, 2017
BEST ANSWER: Yes it can be used without a hard hat