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Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE

Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE

Best price now

$50.00at AmazonObserved at 12:16 PM

17% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Our take on the Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE

The Craftsman CMCB204-OPE is a 20V MAX lithium-ion pack rated at 4.0Ah, roughly double to triple the capacity of the compact 1.5Ah batteries that ship with many V20 kits. It fits the whole V20 line, from drills and impact drivers to string trimmers and blowers, and has a 3-LED charge gauge. The best new price is $50.00 at Amazon as of November 4, 2026, with 4 stores listing it new; that is near the low end of what this pack typically sells for.

Best forOwners of Craftsman V20 drills, saws and outdoor toolsLong runtime on trimmers, blowers and circular sawsReplacing a worn or lost 1.5Ah starter batteryBuying a second pack for all-day jobs
Pros
  • 4.0Ah capacity gives long runtime in high-draw tools
  • 3-LED gauge shows charge at a glance
  • Fits every Craftsman V20 tool and charger
  • No memory effect, so partial charges are fine
  • Often priced near $50, low for a 4.0Ah pack
Cons
  • Heavier and bulkier than the 1.5Ah and 2.0Ah packs
  • V20 only; not compatible with other brands or older Craftsman 19.2V tools
  • No charger included
  • Not a high-output pack for the most demanding tools

Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE prices at every store

  • ShopLineUSANew

    In stockReturn policy

    $62.00Observed at 12:16 PM
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  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $50.00Free shippingObserved at 12:16 PM
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  • AmazonRefurbished

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $45.95+ $11.95 shippingObserved at 12:16 PM
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  • Lowe'sNew

    Availability unknown

    $59.00Free shippingObserved at 12:35 PM
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  • eBayNew

    Availability unknownSold by yumelectronics

    $60.00Observed at 12:35 PM
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  • ZoroNew

    Availability unknown

    $65.55Observed at 12:35 PM
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Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE price history

Lowest price we've seen: $50.00 on Nov 4 at Amazon. Tracked across 4 stores since Nov 4.

What reviewers say

Owners of Craftsman V20 tools generally rate this pack well for runtime and value, treating it as the workhorse battery for trimmers, blowers and saws. Complaints center on weight and on packs that fade after a few years of heavy use.

Pros
  • Noticeably longer runtime than the small kit batteries
  • Charge indicator is handy in the yard
  • Good value at around $50
Cons
  • Adds weight to handheld tools
  • Some packs lose capacity after a couple of seasons
  • No charger in the box

From ShopLineUSA

  • 4.0Ah capacity offers up to three times the capacity of a standard 20V MAX lithium battery
  • Professional-grade high-performance cells deliver improved power
  • Longer cycle life withstands more charges and lasts longer
  • 3-LED state of charge indicator shows remaining battery life at a glance
  • No memory effect and virtually no self-discharge
  • Compatible with the CRAFTSMAN V20 cordless system of power tools and outdoor equipment
Shipping
Shipping calculated at checkout.
In the box
(1) 20-volt MAX 4.0Ah Lithium Ion Battery

About the Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE

Craftsman V20* 4.0Ah Lithium Ion Battery (model CMCB204-OPE)

Designed to provide exceptional performance and extended runtime for heavy-duty jobsite and outdoor applications. This powerful battery is part of the CRAFTSMAN® V20* cordless system, making it compatible with a wide range of V20 tools, both power tools and outdoor equipment. Here’s a detailed breakdown of its key features:

Key Features:

Extended Runtime:

This V20 4.0Ah battery offers up to three times the capacity of a standard 20V MAX* lithium battery, providing more power and longer runtime for demanding tasks on the jobsite. Whether you're tackling large projects or need extra time for outdoor maintenance, this battery will help keep your tools running longer.

Improved Power:

The battery features professional-grade high-performance cells that deliver improved power, ensuring your tools operate at peak efficiency. This makes it ideal for both high-demand tasks and more delicate jobs that require consistent power output.

Longer Life:

With a longer cycle life , this battery is built to withstand more charges and last longer, providing extended battery life for continued productivity over time. Its durable construction ensures reliability, even in tough work environments.

State of Charge Indicator:

The battery comes equipped with a 3-LED state of charge indicator , allowing you to easily check the remaining battery life at a glance. This provides immediate feedback on the battery’s charge status, so you can plan accordingly and avoid unexpected interruptions.

No Memory and Low Self-Discharge:

Designed with no memory effect and virtually no self-discharge , the battery is always ready to go when you are. Unlike older battery technologies, this feature means the battery can be charged at any time without losing capacity or lifespan, maximizing your productivity.

Part of the V20 Cordless System:

The V20* 4.0Ah Lithium Ion Battery is fully compatible with CRAFTSMAN® V20 cordless tools, making it versatile and easy to integrate into your existing tool collection. It's an essential part of the V20 Cordless System, powering both outdoor equipment like lawnmowers and leaf blowers, as well as power tools such as drills and saws.

Benefits:

Maximum Productivity: With no memory and virtually no self-discharge , this battery ensures your tools are always ready for use, maximizing uptime and minimizing downtime.

Heavy-Duty Performance: Ideal for heavy-duty applications on the jobsite, it’s designed to handle tough work while maintaining high power output.

Easy Monitoring: The 3-LED state of charge indicator gives you real-time insight into the battery’s charge, making it simple to monitor and avoid running out of power unexpectedly.

Included in the Package:

• (1) 20-volt MAX 4.0Ah Lithium Ion Battery

Whether you're a professional contractor or a DIY enthusiast, the Craftsman V20 4.0Ah Lithium Ion Battery is built to meet the demands of rigorous tasks and provide long-lasting, reliable power.

Questions and answers

Is the 4.0Ah battery worth it over the 1.5Ah?
Yes if you run trimmers, blowers or saws. The 4.0Ah pack lasts roughly two to three times as long per charge, at the cost of extra weight.
Will it fit my Craftsman V20 drill?
Yes. It works with all Craftsman V20 power tools and outdoor equipment and charges on V20 chargers. It does not fit older 19.2V Craftsman tools.
Does it come with a charger?
No. The box contains one 4.0Ah battery only. You need a V20 charger, which usually comes with tool kits.
How long does a charge last?
Expect roughly 30 to 60 minutes in a string trimmer or blower and several hours of intermittent drilling. Runtime depends on the tool and load.
When is it cheapest?
It sits near $50 at Amazon as of November 4, 2026. Battery packs usually drop during spring outdoor promotions and Black Friday.
Where is the Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE cheapest?
At Amazon, for $50.00, 17% under what the other stores charge, as of our latest check.
Where can I buy the Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE?
5 stores we checked sell it, including Lowe's, Zoro, eBay, ShopLineUSA, Amazon.

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