Does it come with a battery and charger?

No. It is a bare tool, so you need a separate M12 battery and charger, or an existing M12 kit.

What pressure does it produce?

Up to 8,000 PSI max operating pressure, which Milwaukee calls the highest in its class.

Which batteries does it use?

Any Milwaukee M12 lithium-ion battery, the same pack used across the M12 line.

Is it good for cold weather?

Yes. The high pressure is aimed at cold grease and clogged fittings that stall manual guns.

How does it compare with a manual grease gun?

It is heavier and needs a battery, but it pumps one-handed and clears fittings a lever gun cannot.

Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool)

Best price now

$136.04at WalmartChecked 7 min ago

Prices are checked against each store and labelled with when.

Visit Walmart

Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool)

Best price now

$136.04at WalmartChecked 7 min ago

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Lowest price today: $136.04 at Walmart (checked Nov 12, 2026).

Our take on the Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool)

The Milwaukee 2446-20 is a 12V cordless grease gun built for heavy equipment and cold-weather work. It delivers up to 8,000 PSI max operating pressure, the highest in its class, and runs on the M12 battery platform shared with Milwaukee drills, impact drivers and lights. At 7.2 lbs and 14 inches long it is heavier than a manual lever gun but far less tiring over a long lube route. Owners rate it highly for pushing grease through clogged or cold fittings where hand pumps stall.

Best forHeavy equipment and fleet maintenanceCold-weather greasingTechs already on the M12 battery platformHigh-volume lube routes that wear out hand pumps

Pros

Up to 8,000 PSI max pressure clears clogged and cold fittings
Runs on the M12 battery platform shared with other Milwaukee tools
Best-in-class runtime per charge
Cordless and one-handed compared with a lever gun
Bare tool keeps it lighter and cheaper if you own M12 batteries

Cons

Bare tool: no battery or charger included
7.2 lbs and 14 inches long is bulky in tight spots
12V platform limits it to grease-gun duty, not heavy continuous pumping
Needs a separate M12 battery and charger if you are new to the platform

Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool) prices at every store

WalmartNew
In stockSold by Significant ServicesReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$136.04Free shippingChecked 7 min ago
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Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool) price history

Lowest price we've seen: $129.99 on Nov 13 at Amazon. Tracked across 18 stores since Nov 13.

What reviewers say

4.8 / 535 ratings

Owners rate it 4.8 out of 5 and praise the pressure and runtime for heavy machinery and cold weather. Complaints center on the bare-tool packaging and the bulk of the gun.

What people mention

PressurePraisedOwners say it pushes grease through clogged and cold fittings where manual guns fail.
RuntimePraisedReviewers report long runtimes per charge on M12 batteries.
BuildPraisedBuyers describe it as sturdy and well made, typical of Milwaukee tools.
Bare toolCriticisedSome buyers note it arrives without a battery or charger and needs the M12 platform.
SizeMixedThe 14-inch length and 7.2 lb weight make it awkward in tight spaces, though fine on open equipment.

About the Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool)

The Milwaukee M12 Cordless Lithium-Ion Grease Gun is a battery-powered grease gun for heavy-duty applications. It delivers more than 8,000 PSI max operating pressure, which suits heavy machinery, cold weather use and clogged grease fittings.

It runs on M12 12V lithium-ion batteries, which are compatible with M12 tools for drilling, fastening, lighting and cutting.

Model: 2446-20
Power source: Battery
Voltage: 12 V
Battery type: Lithium-ion
Max pressure: More than 8,000 PSI
Weight: 7.2 lbs
Length: 14 in
Color: Silver
Compatibility: M12 batteries and system
Configuration: Bare tool

Specifications

color: SilverSource
size: 7.2 lbsSource
Battery Technology: Li-IonSource
Power Source: BatterySource
Voltage (V)

Questions and answers

Does it come with a battery and charger?: No. It is a bare tool, so you need a separate M12 battery and charger, or an existing M12 kit.
What pressure does it produce?: Up to 8,000 PSI max operating pressure, which Milwaukee calls the highest in its class.
Which batteries does it use?: Any Milwaukee M12 lithium-ion battery, the same pack used across the M12 line.
Is it good for cold weather?: Yes. The high pressure is aimed at cold grease and clogged fittings that stall manual guns.
How does it compare with a manual grease gun?: It is heavier and needs a battery, but it pumps one-handed and clears fittings a lever gun cannot.
Where is the Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool) cheapest?: At Walmart, for $136.04, as of our latest check.
What do buyers say about the Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool)?: Rated 4.8 out of 5 from 35 ratings.
Where can I buy the Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun (Bare Tool)?: 17 stores we checked sell it, including Walmart, Grainger Industrial Supply, Tool Nut, SupplyHouse.com, The Milwaukee Store.