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Craftsman V20 4.0Ah Battery vs Craftsman V20 2.0 Ah Battery

Both are genuine Craftsman V20 batteries that fit the same tools and chargers. The 4.0 Ah CMCB204 doubles the capacity of the 2.0 Ah pack, so it runs tools roughly twice as long per charge and is the better pick for saws, grinders and other high-draw tools. The 2.0 Ah pack is lighter and charges in about half an hour, which suits drills, drivers and quick jobs. Owners of both report the same 3-year limited warranty and the same V20 fit; the real trade-off is runtime and weight against charge speed.

  • Choose the Craftsman 4.0 Ah CMCB204 if you run high-draw tools like circular saws or grinders and want fewer battery swaps.
  • Choose the Craftsman 2.0 Ah if you mostly use drills and drivers and want a lighter pack that recharges fast.

Prices

  • Craftsman V20 4.0Ah Battery: $50.00 at Amazon (last seen Nov 9)
  • Craftsman V20 2.0 Ah Battery: $29.99 at eBay (last seen Nov 9)
  • Difference: the Craftsman V20 2.0 Ah Battery is $20.01 cheaper than the Craftsman V20 4.0Ah Battery at the latest prices (Nov 9)
Craftsman
Craftsman V20 4.0-Amp Hour Lithium Ion Battery (CMCB204)

Craftsman V20 4.0Ah Battery

Craftsman V20 4.0-Amp Hour Lithium Ion Battery (CMCB204)

$50.00at AmazonChecked 13 h ago
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Pros
  • Double the capacity of the 2.0 Ah pack
  • Longer runtime in saws, grinders and other high-draw tools
  • Holds voltage better under heavy load
  • Fits every V20 tool and charger
Cons
  • Heavier, which makes a drill feel nose-heavy
  • Takes longer to recharge
  • Bulkier in a tool bag
Craftsman
CRAFTSMAN V20 2.0 Ah Lithium Ion Battery

Craftsman V20 2.0 Ah Battery

CRAFTSMAN V20 2.0 Ah Lithium Ion Battery

$29.99at eBayChecked 13 h ago
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Pros
  • Light and well balanced for drills and drivers
  • Recharges in about half an hour
  • Same V20 fit and 3-year limited warranty
  • Good spare to keep in a kit
Cons
  • Half the runtime of the 4.0 Ah pack
  • Struggles in high-draw tools like circular saws
  • More frequent battery swaps on long jobs

What separates them

Craftsman V20 4.0Ah BatteryCraftsman V20 2.0 Ah Battery
Capacity4.0 Ah2.0 Ah
Runtime per chargeAbout twice the run time of the 2.0 Ah packHalf the run time of the 4.0 Ah pack
WeightHeavier, noticeable on a drillLighter, better balance for one-handed work
Charge timeLonger; roughly double the 2.0 Ah packAbout 0.5 hours on a V20 charger
High-draw toolsHolds voltage better under load in saws and grindersSags sooner in saws and grinders
Fit and compatibilityV20 20-volt max, fits all V20 tools and chargersV20 20-volt max, fits all V20 tools and chargers
Warranty3-year limited3-year limited

Price history

$50.00$31.99
Nov 4Nov 9
  • Craftsman V20 4.0Ah Battery: lowest $50.00 on Nov 4 at Amazon; $50.00 on Nov 9.
  • Craftsman V20 2.0 Ah Battery: lowest $31.99 on Nov 9 at eBay.

Prices at every store

Craftsman V20 4.0Ah Battery

  • AmazonNew

    Availability unknown

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

    $50.00Free shippingChecked 13 h ago
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  • Lowe'sNew

    Availability unknown

    $59.00Checked Nov 4
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  • ZoroNew

    Availability unknown

    $65.55Checked Nov 4
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  • Buy & Sell OutletCheck price at Buy & Sell Outlet
  • The General Store SpokaneCheck price at The General Store Spokane
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Craftsman V20 2.0 Ah Battery

  • eBayNew

    Availability unknownSold by twf-retail (99.8% positive, 8,300 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $29.99Free shippingChecked 13 h ago
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  • AmazonNew

    Availability unknown

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    $43.00Free shippingChecked 13 h ago
    Visit Amazon
  • mercari.comNew

    Availability unknown

    $59.85Checked Nov 4
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  • Lowe'sNew

    Availability unknown

    $89.00Free shippingChecked 13 h ago
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  • eBayCheck price at eBay

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Specs compared

SpecCraftsman V20 4.0Ah BatteryCraftsman V20 2.0 Ah Battery
Sub-Brand—V20
Charges Battery Type—Lithium Ion (Li-ion)
Package Contents—(1) V20 2.0Ah Lithium Ion Battery
Type—Battery
Battery Package Count—1
Battery Type—Lithium-ion
Battery Voltage—20-volt max
Battery 1 Amp-Hours—2
Battery 2 Amp-Hours—0
Voltage—20
Charge Time (Hours)—0.5
Cordless—true
Show all 15 specsShow fewer specs
SpecCraftsman V20 4.0Ah BatteryCraftsman V20 2.0 Ah Battery
Brand/Model Compatibility—CRAFTSMAN V20
Warranty—3-year limited
CA Residents: Prop 65 Warning(s)—false

What reviewers say

Craftsman V20 2.0 Ah Battery

Owners treat this as a dependable spare pack that fits their V20 tools and charges fast. Most complaints center on runtime in heavy tools rather than on the pack itself.

What people mention
  • RuntimeCriticisedOwners say it drains quickly in high-draw tools like circular saws and blowers.
  • FitPraisedBuyers report it seats firmly in V20 tools with no wobble.
  • Charge timePraisedUsers like that it tops up in about half an hour on a V20 charger.
  • ValueMixedSome feel the capacity is small for what a single pack offers compared with larger V20 batteries.

Questions and answers

Which is better for a circular saw?
The 4.0 Ah CMCB204. A saw draws heavy current, and the larger pack keeps voltage up longer, so you get more cuts per charge and fewer stalls.
Which lasts longer, the 4.0 Ah or the 2.0 Ah?
Per charge, the 4.0 Ah runs about twice as long. Both use the same lithium-ion cells and carry the same 3-year limited warranty, so overall service life is similar.
Is the 4.0 Ah worth stepping up to?
Yes if you use high-draw tools or work away from a charger for long stretches. If you mostly drive screws and drill holes, the lighter 2.0 Ah is easier to handle.
Do both fit the same tools and chargers?
Yes. Both are V20 20-volt max packs and fit every Craftsman V20 tool and charger.
How long does the 2.0 Ah take to charge?
About half an hour on a V20 charger. The 4.0 Ah takes roughly twice as long on the same charger.
Can I use them together in a two-battery tool?
Only if the tool calls for two packs of the same capacity. Mixing a 4.0 Ah and a 2.0 Ah in one tool is not recommended.

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More comparisons

  • Craftsman V20 20V MAX Lithium-Ion 4.0Ah Battery Pack vs CRAFTSMAN V20 2.0 Ah Lithium Ion Battery
  • Craftsman V20 4.0-Amp Hour Lithium Ion Battery (CMCB204) vs Craftsman V20 9.0Ah Lithium Ion Battery
  • CRAFTSMAN V20 2.0 Ah Lithium Ion Battery vs V20 4.0Ah Lithium Ion Battery (2 Pk)
  • CRAFTSMAN V20 2.0 Ah Lithium Ion Battery vs Craftsman V20 9.0Ah Lithium Ion Battery

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