Description:

Key Features

Compact RuntimeThe 2.0Ah pack gives you useful runtime without adding much bulk. That matters when you are working overhead, in cabinets, or with smaller M12 tools where balance makes a difference.REDLINK ProtectionBuilt-in electronics help protect the battery and tool from overload. In real use, that means better pack life and less chance of cooking a battery during heavier work.M12 Battery FitThis Milwaukee compact battery is made for the M12 platform, so it powers Milwaukee M12 cordless power tools. If you want to keep your setup light and stay on one battery system, this is the everyday pack.

Overview

The Milwaukee 48-11-2420 M12 REDLITHIUM 2.0Ah Compact Battery Pack is a 12V lithium-ion battery pack built for Milwaukee M12 cordless tools. This is a compact lithium-ion power tool battery designed for powering Milwaukee M12 cordless tools. Model Number: 48-11-2420. It is a good fit for users who want a lighter pack for service work, punch-list jobs, overhead tasks, and everyday drilling or fastening where keeping the tool small matters as much as runtime.

At 2.0 amp hours, this battery sits in the sweet spot for compact M12 setups. You get more working time than the smallest packs while keeping the tool easier to handle than a larger extended-capacity battery. Milwaukee also positions this REDLITHIUM battery as an upgrade over standard lithium-ion packs, with longer runtime, more power, and more recharge cycles over the life of the pack.

What matters on the job is how the pack changes the tool in your hand. The compact housing helps smaller M12 drills, impact drivers, inspection tools, and service tools stay maneuverable in tight spots. At about 0.465 lb, it does not load the handle down much, which helps reduce fatigue when you are reaching, climbing, or working one-handed in finished spaces.

Milwaukee builds this battery around REDLINK Intelligence, which is the communication and protection system between the tool, battery, and charger. In practical terms, that means the pack is designed to help manage overload conditions and protect against cell damage. Milwaukee also calls out temperature management and individual cell monitoring to support longer battery life, which is exactly what buyers want from a daily-use battery that will see repeated charge cycles.

This battery is also built for jobsite conditions, not just shop use. Milwaukee states that it delivers fade-free power in extreme conditions and can perform in climates below 0 degrees Fahrenheit. If you work outside, in unheated buildings, or in winter service calls, that kind of cold-weather performance matters a lot more than it does on paper.

Charging times are straightforward. Milwaukee lists about 30 minutes on a Rapid Charger, 30 minutes on a Super Charger, and 43 minutes on a Standard Charger. Charger not included. That makes this a practical spare or replacement battery for anyone already on the M12 platform, especially if you are rotating packs through a charger during the day.

Compatibility is one of the big reasons to buy it. The Milwaukee 48-11-2420 M12 REDLITHIUM 2.0Ah Compact Battery Pack is made for the Milwaukee M12 battery system and is meant to power Milwaukee M12 cordless power tools across the platform. If you already own M12 tools, this is the simple way to add another battery without changing chargers, tools, or storage.

Who should buy it? This pack makes the most sense for contractors, maintenance techs, electricians, HVAC techs, plumbers, and serious DIY users who already run M12 tools and want a compact everyday battery. If you want maximum runtime for high-draw tools, you may step up to a larger pack. If you want the lightest useful battery for general use, this one is the practical choice.

Keep Your M12 Tools Light and Ready

The compact form factor is the whole point here. This pack gives you solid day-to-day runtime while keeping your M12 setup easier to carry, easier to control, and less tiring during repetitive work.

• 2.0Ah capacity balances runtime and tool size
• Approximate battery weight: 0.465 lb
• Built for Milwaukee M12 cordless power tools
• REDLINK Intelligence helps protect the battery and tool under load

What's in the Box

• (1) Milwaukee M12 REDLITHIUM CP2.0 Battery (48-11-2420)

Charger not included.

Key Specifications

Compatibility

Battery PlatformCompatible with Milwaukee M12 cordless power tools.Charging SystemWorks with Milwaukee M12 charging solutions. Milwaukee lists charge times for Standard, Rapid, and Super Chargers.

Built For

ElectricalHVACPlumbingMaintenanceService WorkRemodelingGeneral ContractingDIY / Hobbyist

Pro Tip

If you use smaller M12 drills, impact drivers, or inspection tools most of the day, keep this CP2.0 pack on the tool and save your larger batteries for the high-draw stuff. It keeps the tool better balanced and usually feels a lot better when you are working overhead or inside cabinets.

Warranty & Support

Milwaukee backs this battery with a 2 Year Limited Warranty.

Tool Nut's Take

Tool Nut's Take

Milwaukee 48-11-2420 M12 REDLITHIUM 2.0Ah Compact Battery Pack Is the Everyday M12 Pack

If you want one battery that keeps your M12 tools compact, balanced, and ready for real work, this is the one a lot of users end up grabbing first.

• Who it's for: Anyone already running Milwaukee M12 tools who wants a light, compact battery for daily use, service calls, and tight-space work.
• Why it stands out: It gives you 2.0Ah runtime in a small package, includes REDLINK protection, and stays within the M12 system you are already using.
• Worth knowing: This is a single battery, non-kit purchase, and the charger is not included. If your priority is the smallest setup with useful runtime, that is not a downside, that is the reason to buy it.

Common Questions

• What tools does this battery fit? It is designed for Milwaukee M12 cordless power tools.
• Is this a compact battery or an extended-capacity battery? This is a compact 2.0Ah battery pack built to keep M12 tools lighter and smaller.
• How long does it take to recharge? Milwaukee lists about 43 minutes with a Standard Charger and 30 minutes with a Rapid Charger or Super Charger.
• Does this battery include a charger? No. Charger not included.