Description:

Key Features

Compact 2.0Ah Power The Milwaukee 48-11-1820 M18 REDLITHIUM 2.0Ah Compact Battery Pack gives you 18V power in a lighter, smaller pack. That matters when you're running drills and impact drivers all day and want less weight in hand. Fuel Gauge Onboard The built-in fuel gauge shows remaining charge at a glance. You spend less time guessing and less time walking back for a fresh battery. REDLINK Protection REDLINK Intelligence helps protect the pack and tool from overload and cell damage. That translates to more reliable performance and better battery life under real jobsite use.

Overview

The Milwaukee 48-11-1820 M18 REDLITHIUM 2.0Ah Compact Battery Pack is a compact 18V lithium-ion battery for Milwaukee M18 cordless tools. This is a battery pack designed for powering M18 drills, impact drivers, lights, and other cordless jobsite tools. Model Number: 48-11-1820. If you want a lighter pack for everyday fastening, service work, and punch-list jobs, this is the one that keeps tool weight down without stepping outside the M18 platform.

Milwaukee rates this pack at 2.0 amp-hours, with REDLITHIUM construction aimed at delivering more runtime, more power, and more recharges than standard lithium-ion batteries. In practical terms, that makes this a good match for lighter-demand applications where compact size matters more than maximum runtime. It is especially useful on tools you carry constantly or use overhead, where a bigger battery quickly gets old.

The compact housing helps the battery fit tight work areas better than larger extended-capacity packs. At about 0.95 lb and roughly 4.66 inches long, it keeps the tool balanced and easier to control. Milwaukee also calls out durable pack construction, a rubber overmold, and built-in protection features that help the battery hold up on the job.

REDLINK Intelligence is the big functional feature here. The battery communicates with compatible Milwaukee M18 tools and chargers to help manage performance and protect against overload. There is also discharge protection to help prevent cell damage, plus temperature management and individual cell monitoring to support longer pack life.

For jobsite practicality, the onboard fuel gauge is one of those features you end up using constantly. A quick check tells you whether you can finish the task or need to swap packs before you get on a ladder, into an attic, or under a sink. Milwaukee also states this battery is built to perform in climates below 0 degrees Fahrenheit, which matters for outdoor service work and winter construction.

This battery is part of the Milwaukee M18 battery system and is made to power more than 40 Milwaukee M18 cordless power tools. Recharge time is 42 minutes on a standard charger, with faster charging available on compatible rapid and super chargers. If you already own M18 chargers and tools, this is a straightforward way to add a compact pack to the lineup.

Who should buy it? Electricians, HVAC techs, plumbers, maintenance crews, remodelers, and serious DIY users who want a smaller M18 battery for lighter-duty work. If your priority is long runtime on saws or grinders, move up in amp-hours. If your priority is lower weight, tighter access, and better balance on everyday cordless fastening and drilling, this compact battery pack makes a lot of sense.

Keep Your M18 Tools Lighter

This compact battery pack is built for users who want M18 platform compatibility without hanging extra weight off the bottom of the tool. It is the better pick when balance, reach, and day-long comfort matter more than max runtime.

• 2.0Ah capacity in a compact M18 battery format
• Approximate weight: 0.95 lb
• Onboard fuel gauge helps track remaining runtime

What's in the Box

• (1) Milwaukee M18 REDLITHIUM 2.0Ah Compact Battery Pack

Charger is not included.

Key Specifications

Compatibility

Battery Platform Fits Milwaukee M18 cordless tools. Chargers Charges on compatible Milwaukee M18 standard, rapid, and super chargers. Tool Use Best suited for M18 tools where compact size and lower weight are more important than extended runtime.

Built For

Electrical HVAC Plumbing Remodeling General Contracting Service Work Cordless Fastening Light Drilling

Pro Tip

Keep the CP2.0 on your drill or impact driver for overhead work, cabinet installs, and service calls where tool balance matters. Save the larger packs for high-draw tools and longer run jobs.

Warranty & Support

2 Year Limited Warranty.

Tool Nut's Take

Tool Nut's Take

Milwaukee 48-11-1820 M18 REDLITHIUM 2.0Ah Compact Battery Pack for lighter everyday carry

This is the M18 battery you grab when you want the tool to stay compact, balanced, and easy to carry.

• Who it's for: Pros and serious DIY users running M18 drills, impact drivers, lights, and service tools that do not need a large high-capacity pack.
• Why it stands out: You get M18 platform compatibility, onboard fuel gauge, and REDLINK protection in a lighter 2.0Ah pack that is easier on your wrist and better in tight spaces.
• Worth knowing: This is a compact battery, not the long-runtime choice for high-draw tools. Charger is sold separately.

Common Questions

• What tools does this battery fit? It fits Milwaukee M18 cordless tools.
• What is the battery capacity? This battery is rated at 2.0 amp-hours.
• How long does it take to recharge? Full recharge time is 42 minutes on a standard charger.
• Does it have a charge indicator? Yes. It has an onboard fuel gauge to show remaining runtime.