Milwaukee
M18 REDLITHIUM 48-11-1820 Rechargeable Battery Pack, 18 V Battery, 2 Ah, 1 Hr Charging
Key Features
AI Generated- Ergonomic compactness reduces strain on the user.
- Designed to endure, offering best‑in‑class durability and reliability.
- All‑weather performance keeps tools running below zero Fahrenheit.
- The battery’s versatility lets you switch between drills, impact drivers, and more.
Delivery and shipping
Local Delivery
Shipping
Return Policy
Easy returns available. Eligibility rules may apply.
The Milwaukee 48-11-1820 M18 RedLithium 2.0 Ah compact battery pack delivers professional-grade runtime and durability for cordless power tools. This 18-volt lithium-ion battery powers more than 40 Milwaukee M18 cordless tools, making it an essential accessory for contractors, DIYers and job site professionals who need reliable, long-lasting performance across multiple applications.
Engineered with Milwaukee's advanced REDLITHIUM technology, this compact battery runs cooler than standard lithium-ion alternatives and maintains fade-free power in extreme jobsite conditions, including climates below 0°F (–18°C). The lightweight, space-saving design reduces user fatigue while fitting easily into tight work spaces. With 2.0 amp-hours of capacity, you get up to 2X more runtime, 20% more power and 2X more recharges compared to standard lithium-ion batteries, keeping you productive with fewer interruptions.
Features and Benefits
- REDLINK Intelligence: Provides optimized performance and overload protection using total system communication between tool, battery and charger to prevent damage during heavy-duty applications.
- Fuel Gauge: Onboard display shows remaining runtime at a glance, reducing downtime on the job.
- All-Weather Performance: Delivers consistent power in extreme conditions and temperatures below freezing without power loss or fade.
- Best-in-Class Construction: Integrated weld frame, cell separator and impact/vibration protective rubber ensure long-lasting durability and reliability.
- Multivoltage Charging: Compatible with both M18 and M12 multivoltage chargers for convenient, flexible charging options.
- Compact Design: Lightweight construction fits in tight spaces and reduces user fatigue during extended use.
Specifications
- Brand: Milwaukee
- Model: 48-11-1820
- Voltage: 18 volts
- Capacity: 2.0 Ah (amp-hours)
- Chemistry: Lithium-ion
- Color: Red
- Dimensions: 5.81 x 5.11 x 2.31 inches
- Weight: 1 pound
- Count: 1 battery pack
- Compatible with 40+ Milwaukee M18 cordless power tools
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Reviews
Customer Reviews
Great tool, battery unable to charge
Have had the drill and driver combo for over a year, maybe longer and then I go to charge the battery and the light flashes green and red and does not charge.
It was nice working battery but it died fast.
It stops taking charge after one year of use. But it was a good battery while it was working.
Impact and drill kit
The battery dont last long the 2.0 for the price of the kit you thought that they give 2 5.0amp battery
Adequate system
i have a drill/driver and impact driver, both brushless, and each came with this battery. i enjoy using these tools for projects in my shop and around the home. i find these batteries to be adequate but i don't spend all day with only one tool in my hand.
Does the job
I do low voltage wiring and is perfect for the job, a full charge is enough for a days work
Decent
Lightweight & does the job. They dont last very long but thats why they sell em in two’s. ?
My first and possibly my last Milwaukee purchase
Bought a compact drill that came with a battery and charger. Battery would only flash red/green when giving it the initial charge. The Milwaukee service center directed me to a service facility 90 miles away (one way). They suggested eservice so I could get a free shipping label but not only could I not find the battery, but all batteries appeared to be ineligible for eservice. This is my first Milwaukee tool purchase and maybe my last.
I would buy this again and again
I got it today it is great i love it could last a bit more my neighbor gave it to for my birthday (it in a few days) but he be here so he gave it early
poor battery performance
I bought the impact drill set over a year a ago and my 2nd battery that ive used less the 10 times is flashing red and green. what do ?
No
I just got mine out of the box and neither of 2 batteries will charge. Charger flashes red and green.
Battery dead
My battery only flashes red and won't charge after trying to charge for a 2nd time.
Brand New Battery Won't Take A Charge
Brand new M18 Red Lithium 2.0 out of the box and when put on the charger the light flashes red and green!
Not sure I would unless I get a replace battery.
Brand new out of the box one of the two batteries would not charge. It just sits in the charger with the red light and green light flashing.
Needed a new small battery
I will not owen any other power tools than milwaukee
Power Without Fade & Surprising Duration
I use the 2AH battery in Milwaukee’s lower power demand tools such as the Orbital Sander and Impact Driver. It’s lightweight while providing all the power the tools are designed for, without fade.
Strong little battery
Compact size and last long enough for what I need. Fairly lightweight too.
Battery life
Let’s put it this way I’ve had that in storage for a year and a half and when I found it it still had two bars on the charger
CP2.0 battery
Seems to have decent runtime. Using in the non-fuel hackzall.
DYI home and cottage, my son got me hooked.
Great battery, and better price...was free w kit i bought lol
Well balanced
Perfect fit for a tool that doesn’t draw much power. Even better in the hoodie and jacket
M18 small power to weight
Excellent smaller m18 battery. Light but has enough power for most m18 tools for small jobs.
Not made for Canadian Prairie Winters
These batteries work great as long as the temperature is above 10 °C. As soon as you get below that there capacity drops by 50+% and if if you try to use them below 0°C they have a hard time powering a flashlight.
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