This bundle pairs the Milwaukee 3841-20 M18 HOTSHOT Jump Starter with the Milwaukee M18 REDLITHIUM HIGH OUTPUT XC6.0 Battery 2-Pack Starter Kit, so the bare-tool jump starter arrives with two high-output packs and a charger. Model Numbers: 3841-20 (M18 HOTSHOT Jump Starter, tool only), 48-59-1862S (M18 HIGH OUTPUT XC6.0 Battery 2-Pack Starter Kit).

The 3841-20 is a battery-powered automotive jump starter built for getting dead vehicles running without the maintenance headaches of traditional jump packs. It uses an internal capacitor system instead of a stored charge, so with an M18 battery installed it can be prepared to jump in under 70 seconds. It delivers up to 2000 peak amps and is rated to start engines up to 8.1L gas and 3.0L diesel.

It is rated to perform from -4°F to 122°F, and the internal capacitors are rated up to 500,000 cycles with no maintenance or pre-charging required. Spark-proof, reverse polarity, and overheat protection help prevent costly mistakes. A custom clamp design improves terminal access in tight engine bays, and a digital display with voltage readout lets you check battery condition before you jump. The tool is IP65 rated (tool only) and weighs 6.9 lbs.

The 48-59-1862S kit includes two M18 REDLITHIUM HIGH OUTPUT XC6.0 battery packs and an M18 charger. HIGH OUTPUT XC6.0 packs provide 50% more power and run 50% cooler than M18 REDLITHIUM XC packs, deliver increased power in extreme cold (below 0°F/-18°C), and have an onboard fuel gauge. REDLINK Intelligence provides overload protection through communication between tool, battery, and charger.

This is the right buy for automotive techs, mobile mechanics, fleet maintenance crews, and contractors with trucks and vans who want a HOTSHOT and are not already stocked with large M18 packs. Both batteries also power the rest of your M18 tools.

A Jump Starter That's Never The Dead One

The HOTSHOT solves the biggest problem with jump packs, and this bundle gives it two high-output packs and a charger so it's ready from day one.

• Who it's for: Automotive techs, fleet crews, mobile mechanics, and contractors who want a HOTSHOT and need M18 batteries to run it.
• Why it stands out: 2000 peak amps, under-70-second readiness, no maintenance, and two HIGH OUTPUT XC6.0 packs that meet Milwaukee's XC5.0-and-larger recommendation.
• Worth knowing: Milwaukee's "up to 70 jump starts" figure is quoted for one XC5.0 battery, not the HIGH OUTPUT XC6.0 packs in this kit, so treat it as a reference point rather than a rating for this bundle.

• Are batteries and a charger included? Yes. Two M18 REDLITHIUM HIGH OUTPUT XC6.0 batteries and an M18 charger are included.
• How much engine capacity can it start? Milwaukee rates it for up to 8.1L gas engines and up to 3.0L diesel engines.
• How quickly can it be ready to jump? Milwaukee states it can be prepared to jump in under 70 seconds.
• Can it be used in cold weather? Yes. It is rated to perform from -4°F to 122°F.