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Milwaukee Redlithium USB Low-Profile Headlamp 2115-21

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Part# 12-05652
MFR Model# 2115-21


Redlithium USB Low-Profile Headlamp is thin with a 1 in. light head, wide flood beam, and is powered by Redlithium USB and delivers 600-lumens of Trueview High Definition Output. The floodlight headlamp features an ultra-thin light head that provides an unobstructed view with 125° of flood beam coverage. Our rechargeable headlamp is designed with the battery pack in the rear for maximum maneuverability in tight spaces and a balanced design for all-day use. The hardhat headlamp is equipped with a sweat absorbing microfiber strap for comfort on bare heads and four included hard hat clips for secure connections on all hardhats. The Milwaukee headlamp has four light output modes: High, Medium, Low, and Eco for 28+ hours of runtime to maximize light output or extend runtime.

The clip-on hard hat light is IP54 rated for water and dust resistance and can withstand up to 2M drops, surviving the toughest conditions on and off the jobsite. The Redlithium USB Low-Profile 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.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • 1" Ultra-thin light head for maximum field of vision and minimal obstruction
  • Designed for comfortable bare head use with crown strap and sweat absorbing micro fiber forehead
  • Perfect for use with reversed or forward hard hats with (4) universal hard hat clips
  • 4 light output modes: Flood High mode: 600-Lumens- 2 hours; Medium mode: 350-Lumens- 6 hours; Low mode: 125 -Lumens- 10 hours; Eco mode: 25-Lumens- 27 hours 125° Flood beam illuminates full field of vision
  • 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
  • LED Fuel Gauge Allows Fast Checking of Redlithium USB Battery Charge
  • Specifications

  • Power Source: Cordless
  • Length: 3.66"
  • Weight: 0.41 lb
  • Width: 1.22 in
  • In The Box

  • (1) Redlithium USB Low-Profile Headlamp(2115-21)
  • (1) 2FT Heavy Duty USB Cord
  • (1) Redlithium™ USB Rechargeable Pack
  • (4) Universal Hard Hat Clips
  • Reviews


    Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.