2-Pack Kobalt 40V 6.0Ah Battery Replacement – KB640-03, KB440-03, KB240-06

Make sure your Kobalt 40V outdoor power tools are ready for use on lawn and garden tasks with this 2-pack of 40V 6.0Ah rechargeable lithium-ion batteries. Each battery has a capacity of 6.0Ah or 6000mAh, so you get two interchangeable battery packs for use with compatible Kobalt 40V cordless tools.

Because one of the batteries can be used while the other is being charged and ready, the 2-pack is useful for extended outdoor activities. Replacement batteries of this type are made for use with compatible Kobalt 40V lawn mowers, string trimmers, chainsaws, leaf blowers, hedge trimmers, and other 40V outdoor equipment.

Before you buy the product, check your original battery's model number and connector design against the information given below.

Product Specifications

Compatible Kobalt 40V Battery Models

This Kobalt 40V replacement battery set is compatible with the following battery models:

• KB640-03

• KB640-06

• KB540C-06

• KB440-03

• KB440C-06

• KB340C-06

• KB2540C-06

• KB245-06

• KB240-06

• KB240C-06

• KBK0140-06

• 2910003-RC

It may also work with other compatible Kobalt 40V battery systems that use the matching battery interface.

Important: Battery model numbers and connector designs can vary. Please compare your original battery before ordering.

Compatible Kobalt 40V Outdoor Tools

These 40V 6.0Ah replacement batteries are designed for compatible Kobalt 40V cordless outdoor equipment, including:

• Kobalt 40V lawn mowers

• Kobalt 40V string trimmers

• Kobalt 40V chainsaws

• Kobalt 40V leaf blowers

• Kobalt 40V hedge trimmers

• Other compatible Kobalt 40V yard and garden tools

The same Kobalt 40V battery platform can support multiple compatible outdoor applications, but actual compatibility depends on the specific tool model and battery connection.

Compatible Kobalt 40V Chargers

The listed compatible Kobalt 40V charger models include:

• KRC40-06

• KRC60-06

• KRC840-03

The slide-in battery connection allows the battery to be installed and removed from compatible equipment and charging systems.

Please verify your charger model before use.

40V 6.0Ah Battery Capacity

Each battery provides 6.0Ah / 6000mAh capacity at 40V. The 2-pack gives you two battery packs that can be rotated between compatible tools and charging sessions.

For outdoor work such as mowing, trimming, cutting, blowing and yard cleanup, having a second battery available can reduce the need to stop and wait for a battery to become available.

Actual operating time varies depending on the tool, workload, operating conditions, cutting or working conditions, and other factors.

Why Choose a 2-Pack Kobalt 40V Battery?

A 2-pack gives you more flexibility when using multiple compatible Kobalt 40V tools.

You can:

• Keep one battery installed in your tool while the second is charging.

• Use the batteries interchangeably with compatible Kobalt 40V equipment.

• Keep a charged battery available for longer outdoor projects.

• Use the same battery platform across compatible lawn and garden equipment.

The 6.0Ah / 6000mAh capacity provides a practical replacement option for compatible Kobalt 40V battery systems.

Compatibility Check Before Ordering

Before purchasing, check the following:

1. Voltage: Your equipment should use the Kobalt 40V battery system.

2. Battery model: Compare your original battery model with the compatible models listed above.

3. Connector: Make sure the slide-in connection and physical interface match your original battery.

4. Charger: Confirm that your charger is compatible with the replacement battery.

If you are unsure whether your tool uses one of the listed battery models, check the model number printed on your original battery or contact us before ordering.

Package Contents

• 2 × Kobalt-compatible 40V 6.0Ah rechargeable lithium-ion batteries

Charger and power tools are not included.

Frequently Asked Questions

Is this a 2-pack of Kobalt 40V batteries?

Yes. This product includes two 40V 6.0Ah / 6000mAh rechargeable lithium-ion batteries.

What Kobalt batteries are compatible with this replacement?

The listed compatible models include KB640-03, KB640-06, KB540C-06, KB440-03, KB440C-06, KB340C-06, KB2540C-06, KB245-06, KB240-06, KB240C-06, KBK0140-06, and 2910003-RC.

What tools can use a Kobalt 40V battery?

Compatible Kobalt 40V batteries can be used with various Kobalt 40V outdoor tools, including lawn mowers, string trimmers, chainsaws, leaf blowers, hedge trimmers and other compatible yard equipment.

What chargers work with this Kobalt 40V battery?

The listed compatible chargers are KRC40-06, KRC60-06, and KRC840-03. Check your charger model before charging.

How much capacity does each battery have?

Each battery has a 6.0Ah / 6000mAh capacity at 40V.

Are the charger and tools included?

No. The package includes 2 batteries only. Chargers and power tools are not included.

How do I know if this battery fits my Kobalt tool?

Check your original battery's 40V rating, model number, and connector design. The tool should also be designed for the Kobalt 40V battery platform.

Can I use these batteries in different Kobalt 40V tools?

They can be used across compatible Kobalt 40V tools that accept the same battery interface. Always verify the specific tool model before installation.