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Craftsman V20 4.0Ah Battery vs Craftsman CMCB209 V20 9.0 Ah Battery

Both are genuine Craftsman V20 packs that fit the same tools, so the choice comes down to capacity versus weight. The 4.0Ah CMCB204 is the lighter, handier pack for drills, drivers and quick outdoor jobs. The 9.0Ah CMCB209 roughly doubles runtime and suits saws, blowers and long jobsite days, but it weighs about 2.2 lb and takes around 2 hours to charge. Owners of both report the 3-LED gauge and no-memory cells work as advertised; the 9.0Ah is the one to step up to only if you keep draining smaller packs.

  • Choose the Craftsman V20 4.0Ah if you want a lighter pack for drills, drivers and short outdoor tasks and already own several batteries to rotate.
  • Choose the Craftsman V20 9.0Ah if you run saws, blowers or other high-draw tools and want maximum runtime per charge on heavy jobs.

Prices

  • Craftsman V20 4.0Ah Battery: $13.94 at thetransitiongroup.org (checked today)
  • Craftsman CMCB209 V20 9.0 Ah Battery: $133.91 at WoodArtSupply (checked today)
  • Difference: the Craftsman V20 4.0Ah Battery is $119.97 cheaper than the Craftsman CMCB209 V20 9.0 Ah Battery today
Craftsman
Craftsman V20 4.0Ah Lithium ION Power Tool Battery - CMCB204-OPE

Craftsman V20 4.0Ah Battery

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

$13.94at thetransitiongroup.orgChecked 1 h ago
See all prices and details
Visit thetransitiongroup.org
Pros
  • Lighter and better balanced for drills, drivers and overhead work
  • Up to 3x the capacity of the standard V20 pack
  • 3-LED gauge shows charge at a glance
  • No memory effect and low self-discharge
  • Fits every Craftsman V20 tool and outdoor product
Cons
  • Drains faster than the 9.0Ah in saws, blowers and other high-draw tools
  • Fewer watt-hours per pack, so more swaps on long jobs
Craftsman
Craftsman CMCB209 V20 9.0 Ah Lithium-Ion Battery

Craftsman CMCB209 V20 9.0 Ah Battery

Craftsman CMCB209 V20 9.0 Ah Lithium-Ion Battery

$133.91at WoodArtSupplyChecked 1 h ago
See all prices and details
Visit WoodArtSupply
Pros
  • Up to 6x the capacity of the standard V20 pack
  • Long runtime for saws, blowers and heavy jobsite work
  • 3-LED state of charge indicator
  • 3-year limited warranty
  • No memory effect and virtually no self-discharge
Cons
  • Heavier at about 2.2 lb, which shifts tool balance
  • Around 2 hours to charge
  • Bulkier in compact tools and tight spaces

What separates them

Craftsman V20 4.0Ah BatteryCraftsman CMCB209 V20 9.0 Ah Battery
Capacity4.0Ah, about 3x the standard V20 pack9.0Ah, about 6x the standard V20 pack
WeightLighter, easier to handle overhead and in compact tools2.2 lb (1.01 kg), noticeably heavier in hand
Runtime on high-draw toolsGood for drills and drivers, shorter on saws and blowersExtreme runtime for heavy-duty jobsite use
Charge timeShorter charge cycle for the smaller packAbout 2 hours (120 minutes)
Tool compatibilityAll Craftsman V20 tools and outdoor equipmentAll Craftsman V20 tools and outdoor equipment
State of charge3-LED indicator3-LED indicator
Cells and memoryProfessional-grade high-performance cells, no memory effectProfessional-grade high-energy cells, no memory, low self-discharge
WarrantyCraftsman V20 battery warranty3-year limited warranty

Price history

$133.91$13.94
Nov 4Nov 11
  • Craftsman V20 4.0Ah Battery: lowest $13.94 on Nov 11 at thetransitiongroup.org.
  • Craftsman CMCB209 V20 9.0 Ah Battery: lowest $133.91 on Nov 11 at WoodArtSupply.

Prices at every store

Craftsman V20 4.0Ah Battery

  • thetransitiongroup.orgNew

    In stock

    $13.94Checked 1 h ago
    Visit thetransitiongroup.org
  • BatteryShipNew

    In stock

    $51.95Free shippingChecked 1 h ago
    Visit BatteryShip
  • eBayNew

    Availability unknownSold by lionel777

    $43.78Checked 1 h ago
    Visit eBay
  • AmazonNew

    Availability unknown

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

    $50.00Free shippingChecked 1 h ago
    Visit Amazon

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All 14 stores and price history →

Craftsman CMCB209 V20 9.0 Ah Battery

  • eBayNew

    In stock

    $169.99Free shippingChecked 1 h ago
    Visit eBay
  • Acme ToolsNew

    In stock

    $189.00+ $6.49 shippingChecked 1 h ago
    Visit Acme Tools
  • WoodArtSupplyNew

    Availability unknown

    $133.91Checked 1 h ago
    Visit WoodArtSupply
  • AmazonNew

    Availability unknown

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

    $139.99Free shippingChecked 1 h ago
    Visit Amazon

Also available at

  • The General Store SpokaneCheck price at The General Store Spokane

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All 13 stores and price history →

Specs compared

SpecCraftsman V20 4.0Ah BatteryCraftsman CMCB209 V20 9.0 Ah Battery
Battery capacity—9 Ah
Battery voltage—20 V
Battery type—20V MAX* Lithium Ion
Charge time—120
Product height—3.2 IN
Product length—7.0 IN
Product width—6.5 IN
Product weight—2.2 LB
Batteries included—1
Warranty—3 Year Limited Warranty
State of charge—3-LED STATE OF CHARGE INDICATOR
Battery technology—Lithium-Ion (Li-Ion)
Show all 30 specsShow fewer specs
SpecCraftsman V20 4.0Ah BatteryCraftsman CMCB209 V20 9.0 Ah Battery
Power Source—Cordless
Power Voltage—20 V
Number Of Batteries Included—1
Battery Charge Time—2 hours
Weight—1.01 kg
Height—8.1 cm
Length—17.2 cm
Width—14.71 cm
Safety Highlights—Virtually no self-discharge, No memory
Tool Type

What reviewers say

Craftsman V20 4.0Ah Battery

Owners use it mainly as a runtime upgrade for V20 trimmers, blowers and saws and report noticeably longer run times than the small stock packs. Complaints center on price and weight rather than performance.

What people mention
  • RuntimePraisedOwners say it runs trimmers and blowers far longer than the small packs that come in kits.
  • CompatibilityPraisedIt clicks into the full V20 line, power tools and outdoor equipment alike.
  • Charge gaugePraisedThe 3-LED indicator is cited as a simple way to check charge before a job.
  • WeightMixedThe extra capacity makes it heavier in hand than 1.3Ah or 2.0Ah packs.

Craftsman CMCB209 V20 9.0 Ah Battery

Owners of the 9.0 Ah V20 pack mostly report long runtime in saws and other high-draw tools and few failures. The common complaints are weight and slow charging rather than reliability.

What people mention
  • RuntimePraisedOwners say high-draw tools run much longer than with the standard V20 pack.
  • WeightCriticisedThe pack is heavy enough to make compact drills and drivers feel nose-heavy.
  • Charge timeCriticisedA full recharge takes around two hours, which owners notice on long jobs.
  • Charge indicatorPraisedThe 3-LED gauge is described as simple and useful for checking charge at a glance.

Questions and answers

Which is better for a circular saw or blower?
The 9.0Ah. High-draw tools drain the 4.0Ah quickly, and the 9.0Ah keeps them running far longer per charge. The trade-off is the extra weight.
Which is better for a drill or impact driver?
The 4.0Ah. It is lighter and keeps the tool balanced for everyday drilling and driving. The 9.0Ah works but makes a compact drill noticeably nose-heavy.
Is the 9.0Ah worth stepping up to?
Yes if you regularly run out of charge on saws, blowers or long jobs. If you mostly use drills and drivers and rotate several packs, the 4.0Ah is the more comfortable choice.
Do both fit the same tools?
Yes. Both are part of the Craftsman V20 system and fit all V20 power tools and outdoor equipment. They also share the same 3-LED charge indicator.
Which lasts longer over time?
Both use no-memory lithium-ion cells with low self-discharge, so lifespan depends on charge cycles and heat. The 9.0Ah carries a 3-year limited warranty; the 4.0Ah is built for longer cycle life than standard packs.
How long does each take to charge?
The 9.0Ah takes about 2 hours on a standard charger. The smaller 4.0Ah charges in less time, though exact time depends on the charger you use.

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More comparisons

  • Craftsman 2-Pack V20 4.0Ah Lithium Ion Battery vs Craftsman CMCB209 V20 9.0 Ah Lithium-Ion Battery

Buying guides that pick them

  • Best Craftsman V20 replacement batteries
—
Battery
Tool Series—V20
Battery System Compatibility—CRAFTSMAN V20
Tool System Compatibility—CRAFTSMAN V20
Compatible Tools—All Craftsman V20* tools and equipment
Included Accessories—(1) CMCB209
Color—Red
Design Highlights—3-LED state of charge indicator
Typical Users—ADULT