Skip to content
Shop Your Local Store Ship to Your Hometown Store
Pro & Contractor Accounts Apply for Net Terms
100,000+ Products Trusted Authentic Brands

Bosch 18V CORE 4 Ah Lithium-Ion Compact Battery

A lighter-weight 18V pack that keeps drills and drivers balanced without sacrificing run time.
Bosch MPN GBA18V40 In Stock & Ready to Ship
$145.00
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

The CORE18V 4.0 Ah Compact battery is built for tools that need to stay light without giving up run time. As part of Bosch's CORE18V lineup, it's sized to keep drills, drivers, and other one-handed tools balanced and easy to maneuver on ladders, in tight spaces, or during long stretches of overhead work.

Lithium-ion construction means steady power delivery from a charge that starts to a charge that's nearly spent, and the compact form factor keeps the tool's center of gravity close to your hand instead of hanging off the end. It's a solid match for anyone running a Bosch 18V system who wants a lighter everyday battery alongside a higher-capacity pack for bigger jobs.

  • Battery type: Lithium-Ion
  • Product type: Compact Battery
  • Sub-brand: CORE18V
  • Voltage: 18V
  • Capacity: 4.0 Amp Hours
  • Packaging: Boxed, 1 battery per package

The Details Specifications

Ships Ground Travels by ground for safe handling — common for items with a lithium battery, aerosol, or liquid inside. Nothing extra to do on your end; it simply ships by truck instead of by air.
Brand Bosch
Model / MPN GBA18V40
UPC 000346627923
Weight 1 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Bosch. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Bosch

Or skip the tabs entirely and buy it down the street. Find a store near you →

Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare