Bosch 18V 4.0 Ah Compact Battery

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Item # 163812499

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$139^.99

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Shop all Bosch

Bosch 18V 4.0 Ah Compact Battery

Item # 163812499

Stocked & Ready

$139^.99

New Cardmembers earn a $20 Reward^‡ with qualifying purchase of $20 or more plus earn 5% in Rewards⁺ on this purchase. Valid through 8/9/26.

Add this item to unlock free delivery!

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Grassland (franklin) TN

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The Bosch CORE18 V 4.0 Ah Compact Battery is the next-gen Lithium-ion battery you owe it to yourself and your tools to buy. The single-layer battery features advancements in design to reduce resistance and increase efficiency, to improve the performance-to-weight ratio of tools used on the jobsite all day. Engineered with 21700 cell technology, the battery matches the power from the original two-layer 4.0 Ah battery with improved performance per cell. Bosch engineered its exclusive CoolPack 2.0 technology to manage the heat of the higher power-density cells, and it provides better cooling than the previous-generation CoolPack system. CoolPack 2.0 cools the compact battery 15% faster than previous 4.0 Ah double-layer versions.

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.

Compact 18V Li-ion battery is engineered to provide next-gen power and runtime, while losing the weight, for optimized performance
High-power cells use enhanced 21700 cell technology, combined with advanced battery design for greater efficiency
Cutting-edge cell design means this compact battery is engineered to improve performance in tools used on jobsite all day, plus CoolPack 2.0 heat management
Bosch-exclusive CoolPack 2.0 technology cools the battery 15% faster than previous 4.0 Ah double-layer versions
Lightest high-power battery weighs only 1.15 lb, but provides performance comparable to much heavier batteries
Features a high-resolution charge-status indicator for your convenience

Brand	Bosch
Country of Origin	Imported
Amperage	4 Ah
Battery Charge Time	0 h
Brand Compatibility	Bosch
Compatible Battery Sizes	18V
Compatible Battery Types	Lithium-ion
Cord Length	0 in.
Features	Compact 18 V Li-ion battery - engineered to provide next-gen power and runtime, while losing the weight, for optimized performance
Input Voltage	18 V
Model Compatibility	Bosch 18 Bare Tools
Number of Batteries Charged	1
Output Current	0 V
Output Voltage	18 V
Package Quantity	1
Product Height	3.3 in.
Product Length	5.6 in.
Product Weight	1.32 lb.
Product Width	3.6 in.
Warranty	3 year
Manufacturer Part Number	GBA18V40

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100 reviews with 5 stars.

7 reviews with 4 stars.

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1 review with 2 stars.

2 reviews with 1 star.

Overall Rating

4.8

107 out of 110 (97%) reviewers recommend this product

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1 to 4 of 114 Reviews .

1 – 4 of 114 Reviews

Tony Botchagalloop

Review 1

Age55 to 64

GenderMale

1 out of 5 stars.

More Power = Bull

9 months ago

I bought a pair of these and they do not perform like described below. Quote: "POWER AND RUNTIME: Delivers 2x the runtime and 60% more power compared to BAT612 18V 2 Ah battery" End Quote: With my impact driver I was disappointed in its torque. I was told the above. It isn't true. I estimate an additional torque of about 3%. Sending them back.

No, I do not recommend this product.

Originally posted on boschtools.com

Response from boschtools.com:

9 months ago

Bosch Tools Customer Support

Thank you for your rating and for sharing your feedback. We’re sorry to hear that the CORE18V® 4 Ah battery did not meet your expectations when paired with your impact driver. The performance claim of “2x runtime and 60% more power compared to the BAT612 2 Ah battery” is based on controlled testing across a range of Bosch 18V tools. It refers to the battery’s ability to deliver higher current and sustain power under load, not necessarily to increasing the torque output of a specific tool. Torque is determined primarily by the tool’s motor and design, while the battery ensures the tool can reach and maintain its maximum performance. Please get in touch with us for further discussion. You may email us at bosch.tools@us.bosch.com or contact us at 1-877-BOSCH99 (1-877-267-2499) from Monday through Friday, 7:00 a.m. to 5:30 p.m. CST.

Thud84

Kentucky

Review 1

5 out of 5 stars.

Nice battery!

9 months ago

I got the Bosch CORE18V 4 Ah battery, and it’s been a game-changer for my tools! It’s super lightweight but still packs a ton of power ,way more than my old 2 Ah battery. I can drill, grind, and even do some light chipping without worrying about running out of juice. The CoolPack technology keeps it from overheating, and the charge-status indicator is super easy to read. I also like that it works with all my Bosch 18V tools and even other AMPShare-compatible products, so I don’t need multiple batteries for different tools. Overall, it’s compact, powerful, and reliable , definitely worth upgrading if you want longer runtime and more power for your Bosch tools.

Yes, I recommend this product.

Originally posted on boschtools.com

Tbone3391

Cleveland, OH

Review 1

5 out of 5 stars.

My fiancé loves it.

a year ago

My fiancé is really enjoying his experience with the Bosch 18V COREB 18V Lithium-Ion 4.0 Ah Compact Battery. It gives him great battery power without all of the normal battery weight. He’s used it to finish jobs around the house, such as putting up and taking down light fixtures. It’s also being utilized to repair the porch lattice. I would recommend it to my friends and family.

Yes, I recommend this product.

Originally posted on boschtools.com

DIY DESIGNER

California

Review 1

5 out of 5 stars.

Power and Longevity

a year ago

The Core 18V 4.0ah with 800 watts of power is exactly what my project needed. I recommend this battery for any weekend warrior project or task. During my DIY project of creating a custom cat tree/tower for my 2 cats and a fun relaxation station for my pup I never ran out of juice or power required. This battery has the power and longevity to help you from start to finish. I found myself needing a recharge before the battery, which is amazing. I noticed that even when the battery was reaching the level of needing to be charged soon. I had no loss of power or performance. It performs at optimum capacity all throughout. Incredibly happy and pleased! With its longevity and necessary power, it does not take a long time to charge and be put back into action.

Yes, I recommend this product.

Originally posted on boschtools.com

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Reviews

Rating Snapshot

Overall Rating

Review this Product

More Power = Bull

Nice battery!

My fiancé loves it.

Power and Longevity