Milwaukee 3841-20 M18™ HOTSHOT™ Jump Starter – Tool Only

The Milwaukee M18™ HOTSHOT™ Jump Starter is a heavy-duty automotive jump solution engineered for trade professionals, fleet operators, roadside techs, and everyday drivers who rely on dependable performance in any environment. Powered by M18™ REDLITHIUM™ batteries, this jump starter uses advanced internal capacitor technology to eliminate the need for pre-charging or regular maintenance. Simply insert a charged M18 battery, and it’s ready to deliver a jump in under 70 seconds. With up to 2000 peak amps and capacity to start gas engines up to 8.1L and diesel engines up to 3.0L, this unit is well suited for work trucks, commercial vans, and personal vehicles alike. Operating consistently from -4°F to 122°F, the HOTSHOT™ ensures you stay powered up even in extreme Canadian winters or summer heat.

Backed by capacitor tech rated for up to 500,000 cycles, the M18™ HOTSHOT™ Jump Starter is built for long-term use and field reliability. With no internal battery to fail, it’s immune to self-discharge and ready at a moment’s notice—making it a trusted tool for emergency services, construction fleets, and independent tradespeople. Designed with heavy-duty, spark-proof clamps and safety systems including reverse polarity and overheat protection, it’s built to get the job done safely, quickly, and consistently.

Milwaukee M18™ HOTSHOT™ Jump Starter At a Glance

• Always Ready To Jump: No maintenance or pre-charging required—just insert a battery and jump within 70 seconds.
• True All-Weather Performance: Reliable from -4°F to 122°F, for consistent use in Canadian winters and summer heat.
• Longer Life: Capacitors rated for up to 500,000 cycles provide long-term reliability and consistent performance.
• High Jumping Power: Delivers up to 2000 peak amps, capable of jumping 8.1L gas or 3.0L diesel engines.
• Battery Efficient: One M18™ REDLITHIUM™ XC5.0 battery delivers up to 70 jump starts on a single charge.
• Heavy-Duty Safety: Built-in spark-proof, reverse polarity, and overheat protection increases jobsite safety.
• Optimized Clamp Design: Custom clamps ensure a secure, effective connection to a wide range of battery terminals.

Milwaukee 3841-20 M18™ HOTSHOT™ Jump Starter Markets

• Fleet Maintenance: Ideal for jump-starting service trucks or delivery vans on-site without waiting for battery charging.
• Construction: Supports contractors and trades who need reliable starts in cold or remote job locations.
• Municipal Operations: Reliable for city crews and snow removal equipment during early morning or cold weather starts.
• Automotive Technicians: Speeds up diagnostics and jump starts in the shop without delays or plug-in time.
• Emergency Services: Trusted by roadside techs or volunteer fire departments where seconds matter and tools must be ready.
• Farming & Agriculture: Useful for jump-starting seasonal or infrequently used equipment in outdoor and rough terrain.
• Industrial Facilities: Keeps equipment moving in large yards or warehousing operations where downtime is costly.

Whether you’re managing a fleet or working in remote or rugged conditions, this jump starter keeps downtime to a minimum and simplifies roadside starts. Fleet managers benefit from the reduced maintenance and consistent all-season performance. Tradespeople save time and hassle knowing the unit is always ready—no trickle charging, no guesswork. Municipal workers and utility crews appreciate the peace of mind of reliable cold-weather starts. With up to 70 jumps per M18™ XC5.0 battery, this unit pairs seamlessly into existing M18™ tool systems, providing maximum value across the jobsite.

Milwaukee 3841-20 M18™ HOTSHOT™ Jump Starter Features

• Always Ready To Jump
• True All-Weather Performance
• Longer Life
• Jump with M18™ Batteries, Optimized For M18™ REDLITHIUM™ XC5.0 & Above
• Prepared To Jump In Under 70 Seconds
• No Maintenance Required
• Jump up To 8.1L Gas & 3.0L Diesel
• Capacitors Rated Up To 500,000 Cycles
• Performs At -4°F To 122°F
• Up To 70 Jump Starts With One M18™ XC5.0 Battery
• 2000 Peak Amps
• Spark Proof, Reverse Polarity, & Overheat Protection

Milwaukee 3841-20 M18™ HOTSHOT™ Jump Starter Specifications

• UPC: 0045242884452
• Peak Amps: 2000
• Battery Compatibility: M18™ REDLITHIUM™ XC5.0 and above
• Jump Start Capacity: Up to 8.1L gas / 3.0L diesel
• Startup Time: Under 70 seconds
• Cycle Life: 500,000 cycles
• Operating Temperature: -4°F to 122°F
• Jump Starts per Charge: Up to 70 (with M18™ XC5.0)
• Dimensions: 4.2″ H x 8.7″ W x 11.5″ D
• Warranty: 3 Year Limited Warranty

Milwaukee 3841-20 M18™ HOTSHOT™ Jump Starter Includes

• (1) M18™ HOTSHOT™ Jump Starter

xMilwaukee 3841-20 M18™ HOTSHOT™ Jump Starter Warranty

• Milwaukee’s 3 Year Limited Warranty

Why Professionals Choose the Milwaukee 3841-20 M18™ HOTSHOT™ Jump Starter

From roadside boosts to jobsite emergencies, the Milwaukee HOTSHOT™ Jump Starter keeps vehicles moving without relying on wall plugs or waiting around. Users call it a battery booster, portable jump box, or cordless jump pack, but no matter what you call it, it’s a reliable solution to avoid downtime. Pair it with your existing M18 tools, stash it in the back of a work truck, or keep it in a municipal fleet vehicle—it’s one of those tools you don’t want to be without when your engine won’t turn over. Whether it’s a cold morning, a dead battery, or a remote location, the HOTSHOT™ means you’re not stuck waiting.