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CPY KB64006 40V 6.0Ah Lithium-Ion Replacement Battery for Kobalt1 / 6
Product guide

CPY KB64006 40V 6.0Ah Lithium-Ion Replacement Battery for Kobalt

CPY KB64006 is a rechargeable lithium-ion replacement battery listed for Kobalt 40V tools. Its stated 6.0Ah capacity, four-LED charge gauge, and claimed fit with several KB-series batteries make compatibility checking important before purchase.

At a glance

  • The listing identifies the model as KB64006 and describes it as a replacement for Kobalt 40V batteries.
  • A four-LED indicator is claimed to show remaining charge when pressed.
  • The manufacturer claims compatibility with named Kobalt batteries and 40V tools, including mowers and trimmers.
Price
$47.99Save 26%

Reference price: $64.99

Price checked: Nov 14, 2026

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Often bought together

Pros and cons

Pros

  • The four-LED charge gauge offers a direct way to check the battery's indicated charge before use.
  • A rechargeable lithium-ion design is specified for compatible cordless power tools.
  • Customer feedback describes secure fit with Kobalt tools, though fit should be confirmed for the exact model.

Cons

  • Reported battery life is mixed, with some customers saying it holds charge like the original and others reporting failure after two months.

Technical specifications

10 specifications
Identity
BrandCPY
ModelKB64006
Power and battery
Battery typeLithium Ion
Stated voltage40V
Stated capacity6.0Ah
RechargeableRechargeable
Battery weight7.5 pounds
Compatibility and features
Charge indicator4-LED fuel gauge
Claimed protectionsovercharge, overheat, and short-circuit
Warranty
Warranty description2 Year

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title states 6.0Ah and names KB540-06, KB440-06, KB240-06, and KB2540C-06, while the longer compatibility text lists additional models and chargers and makes broader all-series claims. Confirm the exact tool and charger model before buying. The stated 3X runtime claim is not accompanied by a comparison basis.

What’s in the box

Included
  • Battery

Who is it for?

A good fit for

  • Kobalt 40V tool owners seeking a replacement battery for a model specifically confirmed as compatible.
  • Buyers who want a battery with a built-in charge indicator.

Less suited to

  • Buyers who need established runtime or long-term durability, since customer feedback on battery life is mixed.
  • Owners whose exact Kobalt tool or charger compatibility is not confirmed by the listing.
CPY KB64006 40V 6.0Ah Lithium-Ion Replacement Battery for Kobalt · photo 2
Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 199 ratings
  • 5 stars69%69%
  • 4 stars10%10%
  • 3 stars4%4%
  • 2 stars3%3%
  • 1 star14%14%

Customer feedback describes the battery as a fitting replacement for Kobalt tools and reports positive impressions of value. Battery life is a concern with mixed reports: some customers say it holds charge like an original battery, while others report it died after two months. For buyers considering the stated 6.0Ah capacity and 40V compatibility, fit and the charge gauge are useful considerations, but the feedback does not establish consistent longevity.

Positive themes

  • Customers describe it as a replacement that fits Kobalt tools securely.
  • Customer feedback includes positive value impressions.

Negative themes

  • Some customer reports say the battery died after two months.

Mixed feedback

  • Battery-life feedback differs, with some customers reporting charge retention comparable to the original and others reporting early failure.

Frequently asked questions

Which Kobalt batteries does the listing name?

The title names KB540-06, KB440-06, KB240-06, and KB2540C-06. The longer listing text names more models, so confirm the exact tool and charger before ordering.

Does the battery include a charge indicator?

The listing claims a four-LED fuel gauge that displays power levels when pressed.

What should I know about reported battery life?

Customer feedback is mixed. Some customers report charge retention comparable to the original, while others report that the battery stopped working after two months.

CPY KB64006 40V 6.0Ah Lithium-Ion Replacement Battery for Kobalt · photo 3
Additional product photo 3

Alternative options

Offer details

  • The manufacturer advises completing a full charge cycle before first use.
  • For extended storage, the manufacturer advises keeping the battery at 50% charge in cool, dry conditions.
  • The manufacturer advises avoiding complete discharge during regular use.
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