Description

Key Features

600 Lumens, Hands-Free

This Milwaukee BOLT REDLITHIUM USB Headlamp throws a wide flood beam up to 600 lumens, so you can keep both hands on the work instead of juggling a flashlight.

Built for BOLT Gear

The low-profile light head and flexible wire routing let it work with BOLT hard hats, helmets, face shields, and visors without getting in the way.

Real Runtime Options

Four output modes let you choose full output for detail work or stretch runtime to 32 hours when all-day lighting matters more than maximum brightness.

Overview

The Milwaukee BOLT REDLITHIUM USB Headlamp, Model 2118-21, is a rechargeable jobsite light made specifically for Milwaukee BOLT hard hats and helmets. This is a headlamp designed for hands-free jobsite lighting on BOLT hard hats and helmets. If you need light that stays put, clears your face shield, and does not force you to give up other helmet-mounted gear, this setup solves that problem better than a generic strap-on headlamp.

The big selling point is how this light fits into the BOLT system instead of fighting it. Milwaukee built the light head with a low-profile design for face shield clearance, then routed power to a rear-mounted battery pack with a flexible wire path so the rest of your BOLT accessories can still work. On the job, that means you can run lighting, eye and face protection, and helmet accessories together without a bulky front-heavy setup.

Output is strong enough for real work. You get a maximum of 600 lumens of flood lighting on high for up to 4 hours, plus medium at 400 lumens for 8 hours, low at 150 lumens for 14 hours, and eco at 25 lumens for 32 hours. That gives this rechargeable headlamp a wider operating range than a lot of lights that are either bright but short-lived or long-running but too dim to be useful. For inspection work, layout, overhead rough-in, shutdown work, and general construction walking, those mode choices matter.

The 70 degree pivoting light head is another feature that actually earns its keep. Instead of blasting light straight ahead and hoping your head angle lines up with the work, you can aim the beam where your hands are working. That is useful when grinding, moving through mechanical rooms, checking panels, or working below chest height where a fixed beam usually misses the target.

Milwaukee also paid attention to comfort and balance. The rear battery pack uses a cam lock mount for a secure attachment and better weight distribution. That matters during long shifts because the light is not hanging all the weight off the front of the helmet. The listed tool weight is only 0.519 lb, and the housing uses polycarbonate, so it stays durable without getting unnecessarily heavy.

For charging and downtime, the system is practical. The included REDLITHIUM USB battery can charge to 50% in under 30 minutes, 80% in under 1 hour, and full in about 2 hours through USB-C. The battery can also be swapped with additional REDLITHIUM USB batteries, which is the smart move if you are running long shifts or multiple lights. The battery status button helps you check charge before climbing, entering a dark area, or starting work in a low-light space.

This headlamp is built for the jobsite, not the garage shelf. It carries an IP54 rating for water and dust resistance and is rated to survive 2 m drops. That gives it the kind of everyday toughness electricians, ironworkers, plant maintenance crews, utility workers, and general contractors usually care about more than fancy beam patterns or gimmicky controls.

If you are already on Milwaukee BOLT hard hats or helmets, this is the cleanest way to add a high-output work light without compromising fit or accessory compatibility. If you are not using the BOLT platform, the value here is more limited, because this light is purpose-built around that mounting system. For BOLT users, though, this is the right kind of dedicated headlamp: balanced, rechargeable, hard-hat ready, and built around real jobsite use.

Built to Work with Face Shields and Visors

This is where the design separates itself from a standard headlamp. The light head stays low and compact so you can keep using a face shield or visor instead of choosing one accessory over another.

• Low-profile front light clears BOLT face shields and visors
• Flexible wire routing keeps the helmet setup functional with other BOLT accessories

Balanced for Long Shifts

The rear-mounted battery pack does more than hold power. It helps counterbalance the light head so the setup feels more secure and less front-heavy when you are moving, bending, or looking up for long stretches.

• Cam lock battery mount helps keep the rear pack secure
• Rechargeable REDLITHIUM USB battery is removable and swappable to reduce downtime

Enough Output for Real Jobsite Work

A headlamp has to do more than turn on. This one gives you enough flood output to light a work area clearly, then lets you step down to longer runtime when you are walking the site, staging material, or working through an extended shift.

• High mode delivers 600 lumens for up to 4 hours
• Eco mode extends runtime up to 32 hours when you need light all day

Made for Dust, Moisture, and Daily Abuse

Jobsite lighting gets dropped, bumped, and exposed to dust long before it wears out electronically. Milwaukee gave this unit the protection level and impact resistance needed for real construction and maintenance work.

• IP54 rated for water and dust resistance
• Built to withstand drops up to 2 m

What’s in the Box

• (1) Milwaukee BOLT REDLITHIUM USB Headlamp (2118-21)
• (1) REDLITHIUM USB 3.0 Battery
• (1) 2 ft USB-C Charging Cable

Key Specifications

Lumens	600 lumens max
Light Modes	4 modes: High, Medium, Low, Eco
Runtime	Up to 32 hrs
Charge Time	Full charge in 2 hrs
Pivot Angle	70°
IP Rating	IP54
Weight	0.519 lb
Material	Polycarbonate

Compatibility

BOLT Hard Hats and Helmets

Designed as a dedicated lighting solution for Milwaukee BOLT hard hats and helmets.

BOLT Accessories

Low-profile head and flexible wire routing maintain compatibility with BOLT face shields, visors, and other BOLT accessories.

Battery Platform

Powered by Milwaukee REDLITHIUM USB batteries, with in-light USB-C charging or battery swapping for extended use.

Built For

Construction Electrical General Contracting Industrial Maintenance Metalworking Low-Light Inspection Hands-Free Lighting Hard Hat Use

Pro Tip

If you are wearing a face shield or visor, set the light angle with the shield down before you start working. The low-profile housing is built for clearance, but dialing in that 70 degree pivot first keeps the beam on the work instead of reflecting back at you.

Warranty & Support

Limited lifetime warranty on the light. Two year warranty on the REDLITHIUM USB battery.

Tool Nut’s Take

Tool Nut’s Take

Milwaukee BOLT REDLITHIUM USB Headlamp is the right answer for BOLT users

This is the one to buy if you already run Milwaukee BOLT head protection and want a clean, balanced, rechargeable headlamp that does not interfere with the rest of your setup.

• Who it’s for: Pros wearing BOLT hard hats or helmets in construction, maintenance, service, and metalworking where hands-free flood lighting matters.
• Why it stands out: The low-profile front light, rear battery balance, 600-lumen output, and real compatibility with shields and visors make it a purpose-built system light, not a generic add-on.
• Worth knowing: If you are not on the Milwaukee BOLT platform, a standard headlamp may make more sense. This light earns its keep when you use the mounting system it was designed around.

Common Questions

• Is this a strap-style headlamp? No. It is a dedicated BOLT-mounted headlamp for Milwaukee BOLT hard hats and helmets, and no strap is included.
• Can the battery be replaced or swapped? Yes. The REDLITHIUM USB battery can be charged in the light through USB-C or swapped with additional REDLITHIUM USB batteries.
• How long does it run? Runtime depends on mode: up to 4 hours on high, 8 hours on medium, 14 hours on low, and 32 hours on eco.
• Is it rated for dust and water exposure? Yes. It has an IP54 rating for water and dust resistance.