A studio shot of the black Bosch CORE18V 18V 4Ah battery pack featuring a large red release button and blue Amp-hour labeling on the side.
An informational diagram of the battery highlighting key features such as high-power 21700 cells, CoolPack 2.0 technology, copper end plates, and the high-resolution charge status indicator.
A side profile view of the battery pack displaying the CORE18V branding, the 4Ah capacity rating, and the heat dissipation vents.
Front view of the battery showing the electrical connection terminals, the Bosch logo, and the on-board LED fuel gauge for monitoring charge levels.
Rear view of the battery pack focusing on the large textured red release button used to detach the battery from tools and chargers.
A marketing graphic titled Same Battery New Look comparing previous CORE18V designs with the updated AMPShare compatible labeling on the side.
The 18V battery pack sitting on a wooden surface at a construction site, with a blurred background of framing structures.
A close-up of a worker's gloved hand inserting the CORE18V battery into a charging base on a wooden workbench.
The 4Ah battery pack mounted on a Bosch fast charger, sitting on a wooden plank at a sunny jobsite.
A warranty information graphic stating 18V Limited Warranty 3 Year Battery against a dark blue background.
Bosch CORE18V™ Advantage promotional video
A studio shot of the black Bosch CORE18V 18V 4Ah battery pack featuring a large red release button and blue Amp-hour labeling on the side.
An informational diagram of the battery highlighting key features such as high-power 21700 cells, CoolPack 2.0 technology, copper end plates, and the high-resolution charge status indicator.
A side profile view of the battery pack displaying the CORE18V branding, the 4Ah capacity rating, and the heat dissipation vents.
Front view of the battery showing the electrical connection terminals, the Bosch logo, and the on-board LED fuel gauge for monitoring charge levels.
Rear view of the battery pack focusing on the large textured red release button used to detach the battery from tools and chargers.
A marketing graphic titled Same Battery New Look comparing previous CORE18V designs with the updated AMPShare compatible labeling on the side.
The 18V battery pack sitting on a wooden surface at a construction site, with a blurred background of framing structures.
A close-up of a worker's gloved hand inserting the CORE18V battery into a charging base on a wooden workbench.
The 4Ah battery pack mounted on a Bosch fast charger, sitting on a wooden plank at a sunny jobsite.
A warranty information graphic stating 18V Limited Warranty 3 Year Battery against a dark blue background.
Bosch CORE18V™ Advantage promotional video
BOSCH

Bosch GBA18V40 CORE18V 18V 4Ah Compact Lithium Ion High Power Battery with Fuel Gauge and CoolPack Technology

In stock
SKU: GBA18V40
$129.00

Description

Maximum Power and Efficiency in a Lightweight Compact Design

Upgrade your cordless workflow with the Bosch GBA18V40 CORE18V 4Ah Advanced Power Battery, the ultimate solution for professionals who demand high performance without the bulk. Weighing only 1.1 lbs, this battery utilizes the latest 21700 lithium-ion cell technology to deliver a single-layer power source that rivals much heavier, double-layer batteries. It provides up to 2x the runtime and 60% more power than legacy 2Ah models, making it the perfect "Goldilocks" choice for standard to medium-duty applications like drilling into concrete, metal grinding, and repetitive cutting where fatigue is a factor.

Built to last, the GBA18V40 features Bosch’s exclusive CoolPack™ 2.0 technology, a cutting-edge heat management system that pulls heat away from the cells to extend battery life and run-time significantly compared to batteries without this protection. The internal architecture includes copper end plates and power rails to reduce resistance and boost efficiency. Fully compatible with the entire Bosch 18V tool lineup and the multi-brand AMPShare™ System, this battery also includes a high-resolution charge-status indicator, ensuring you never run out of power unexpectedly in the middle of a critical task.

Key Features

  • Compact Powerhouse: Weighs just 1.1 lbs while delivering the performance of heavier batteries, reducing user fatigue during overhead work.
  • Next-Gen Cells: Features a single layer of enhanced 21700 lithium-ion cells for greater energy density and efficiency.
  • CoolPack™ 2.0 Technology: Advanced heat dissipation housing cools the battery faster, extending its overall lifetime.
  • High Efficiency Design: Engineered with copper end plates and power rails to minimize resistance and maximize power delivery.
  • On-Board Fuel Gauge: High-resolution LED charge-status indicator provides clear, instant visibility of remaining runtime.
  • Universal Compatibility: Works seamlessly with all Bosch 18V Lithium-Ion tools, chargers, and the AMPShare™ multi-brand system.
  • Optimized Performance: Delivers 100% more runtime and 60% more power compared to standard BAT612 18V 2Ah batteries.

What's Included

  • (1) GBA18V40 18V CORE18V® Lithium-Ion 4 Ah Advanced Power Battery

Specifications

Voltage 18V
Battery Capacity 4.0 Ah
Weight 1.1 lbs
Chemistry Lithium Ion
Model Number GBA18V40
CoolPack Technology Yes (CoolPack 2.0)
Fuel Gauge Yes
System Compatibility Bosch 18V & AMPShare™
Housing Material Plastic
Color Black
Warranty Limited 1 Year (2 Years w/ ProVantage)
Pro-Tip: This compact 4Ah battery is ideal for overhead applications, such as installing drywall or electrical boxes. By pairing the runtime of a larger battery with the lightweight profile of a compact pack, you can work longer on oscillating multi-tools or impact drivers with significantly less wrist strain.