Two Bosch CORE18V 18V 4Ah lithium-ion batteries displayed side-by-side against a white background.
Product informational graphic for the CORE18V 4Ah battery highlighting features such as high-power 21700 cells, increased runtime and power compared to previous models, AMPShare system compatibility, CoolPack 2.0 technology, a low-resistance interior design, and a high-resolution charge-status indicator.
Close-up front view of the Bosch CORE18V 4Ah battery focusing on the five-bar high-resolution charge-status indicator and the Bosch brand logo.
Direct top-down view of the Bosch 18V battery showing the textured red release button and the recessed electrical connector interface.
Two perspective views of the CORE18V 4Ah battery; the left view is labeled Front and shows the CORE18V product logo, while the right view is labeled Back and shows the AMPShare and Bosch branding.
Side profile view of a single Bosch CORE18V 4Ah lithium-ion battery highlighting its black housing and red accents.
Informational graphic titled Same Battery. New Look. explaining the rebranding of the CORE18V 4Ah battery to include the AMPShare logo while maintaining identical performance and build quality.
Marketing graphic featuring the CORE18V logo and text for 4 Ah Advanced Power above a side profile of the battery and the AMPShare system logo.
A warranty informational graphic stating that all 18V battery products are covered by a 3-year limited warranty effective June 1, 2023.
Two Bosch CORE18V 18V 4Ah lithium-ion batteries displayed side-by-side against a white background.
Product informational graphic for the CORE18V 4Ah battery highlighting features such as high-power 21700 cells, increased runtime and power compared to previous models, AMPShare system compatibility, CoolPack 2.0 technology, a low-resistance interior design, and a high-resolution charge-status indicator.
Close-up front view of the Bosch CORE18V 4Ah battery focusing on the five-bar high-resolution charge-status indicator and the Bosch brand logo.
Direct top-down view of the Bosch 18V battery showing the textured red release button and the recessed electrical connector interface.
Two perspective views of the CORE18V 4Ah battery; the left view is labeled Front and shows the CORE18V product logo, while the right view is labeled Back and shows the AMPShare and Bosch branding.
Side profile view of a single Bosch CORE18V 4Ah lithium-ion battery highlighting its black housing and red accents.
Informational graphic titled Same Battery. New Look. explaining the rebranding of the CORE18V 4Ah battery to include the AMPShare logo while maintaining identical performance and build quality.
Marketing graphic featuring the CORE18V logo and text for 4 Ah Advanced Power above a side profile of the battery and the AMPShare system logo.
A warranty informational graphic stating that all 18V battery products are covered by a 3-year limited warranty effective June 1, 2023.
BOSCH

Bosch 18V Battery GBA18V40-2PK CORE18V 4Ah Lithium Ion 2Pack (Lightweight 21700 Cells CoolPack 2.0 AMPShare Cordless Drilling Grinding Power Station)

In stock
SKU: GBA18V40-2PK
$199.00 USD

Description

Bosch Promtional Logo Logout

Industrial-Grade 18V 4.0 Ah Lithium-Ion Battery Set with CoolPack 2.0 Thermal Control and Advanced 21700 Cell Architecture

The Bosch GBA18V40-2PK CORE18V 18V 4.0 Ah Lithium-Ion Battery 2-Pack delivers high-output cordless tool utility and exceptional energy density for commercial jobsite applications. Engineered with a single layer of advanced 21700 cells producing 72 Watt-hours per pack, these high-performance power units generate 60% more power and double the runtime of legacy 2.0 Ah battery models. This portable energy solution resolves rapid drop-off voltage cuts, thermal motor shutdowns, and heavy equipment handling strain during prolonged drilling or grinding by integrating proprietary CoolPack 2.0 heat-dissipation housings. Weighing only 1.10 lbs per battery and featuring full multi-brand AMPShare system integration, this industrial-grade kit optimizes daily contractor productivity across extensive metal cutting, timber boring, and concrete anchor fastening installations.

Best Used For:

  • Continuous Structural Concrete Drilling: Supplying steady high-current voltage to cordless SDS-plus rotary hammers during high-volume anchor installation runs.
  • Heavy-Duty Metal Fabrication Cuts: Driving high-draw cordless angle grinders through thick structural steel framing profiles and piping channels without stalling.
  • Mobile Tradesperson Wood Boring: Maintaining balanced weight overhead when running high-torque drill-drivers with large-diameter self-feed wood bits.

Key Performance & Safety Features

  • Advanced 21700 Cell Architecture: Next-generation high-capacity lithium cells increase standard energy density parameters while reducing total footprint size.
  • CoolPack 2.0 Radiating Housing: Exclusive heat-conductive polymer framework transfers thermal energy away from internal elements to prolong total runtime lifecycles.
  • Low-Resistance Internal Rails: Interconnected with robust copper end plates and internal power rails to maximize current conductivity and minimize energy drops.
  • High-Resolution Fuel Gauge: Integrated multi-segment LED indicator panel displays active remaining battery life clearly to prevent unexpected tool runtime failure.
  • AMPShare System Universal Linkage: Delivers 100% operational cross-compatibility across all Bosch 18V tools and an expanding alliance of global multi-brand products.

What's Included

  • (2) GBA18V40 CORE18V 18V Lithium-Ion 4.0 Ah Advanced Power Battery Packs

Technical Specifications

Specification Value
Brand Name Bosch
Model Number GBA18V40-2PK
Battery Packs Included 2 Batteries
Operating Base Voltage 18V DC
Capacity Charge Rating 4.0 Ah
Battery Watt Hours 72 Wh
Battery Cell Technology Lithium-Ion (Single-Layer 21700 Configuration)
Thermal Management System CoolPack™ 2.0 Material Heat Dissipation
Fuel Gauge Indicator High-Resolution LED State-of-Charge Display
Ecosystem Compatibility Bosch 18V Cordless Tools & AMPShare™ System Alliance
Overall Length Profile 4.6 in.
Overall Width Profile 3.0 in.
Overall Height Profile 1.85 in.
Weight (Single Power Pack) 1.10 lbs.

Pro-Tip: When swapping active cells during high-load cutting operations, wipe down the terminal track receiver lines with a clean, dry micro cloth. Clearing out non-conductive sawdust accumulation prevents micro-resistance anomalies and guarantees optimized amp-delivery through the inner copper rails.