---
product_id: 21711154
title: "Makita BL1840B 18V LXT Lithium-Ion 4.0Ah Battery, Black"
brand: "makita"
price: "€ 140.30"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sk/products/21711154-makita-bl1840b-18v-lxt-lithium-ion-4-0ah-battery-black
store_origin: SK
region: Slovakia
---

# 35% longer runtime 4.0Ah high-capacity power 40-min rapid full charge Makita BL1840B 18V LXT Lithium-Ion 4.0Ah Battery, Black

**Brand:** makita
**Price:** € 140.30
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your productivity—never get caught powerless again!

## Quick Answers

- **What is this?** Makita BL1840B 18V LXT Lithium-Ion 4.0Ah Battery, Black by makita
- **How much does it cost?** € 140.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/21711154-makita-bl1840b-18v-lxt-lithium-ion-4-0ah-battery-black)

## Best For

- makita enthusiasts

## Why This Product

- Trusted makita brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Charge in a Flash:** Reaches full charge in 40 minutes or less—because your time is money.
- • **Built for Extremes:** Delivers consistent power even in freezing temps down to -4°F (-20°C)—work anywhere, anytime.
- • **Stay Powered Longer:** Up to 35% more runtime than previous models keeps your projects moving without pause.
- • **Exclusive Compatibility:** Designed for Star Protection tools only, ensuring seamless, optimized performance.
- • **Smart Battery Monitoring:** Integrated LED charge level indicator means no more guessing when to recharge.

## Overview

The Makita BL1840B 18V LXT Lithium-Ion 4.0Ah Battery offers 35% more runtime and rapid 40-minute charging with an integrated LED charge indicator. Engineered for durability, it performs reliably even in extreme cold and is compatible exclusively with Star Protection tools, making it the go-to power source for professionals demanding efficiency and resilience.

## Description

The Makita 18V LXT Lithium-Ion battery charges faster and works longer than standard lithium-ion batteries, giving you and your cordless tools unmatched performance and productivity to take on the most demanding applications. The Makita 4.0 Ah battery combines more run time (35% more run time per charge than the Makita BL1830 battery) with a category-leading charge time of only 40 minutes, so it spends more time working and less time sitting on the charger. For added convenience, it also features an L.E.D. charge level indicator to monitor battery charge. The 18V LXT 4.0Ah battery (BL1840) is compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool. Makita 18V Lithium-Ion batteries resist self-discharge so they're ready for use even after long periods of storage. The Makita Rapid Optimum Charger (sold separately) is a smart-charging system that communicates with the battery during the charging process to monitor current, voltage and temperature. This advanced charging technology helps optimize battery life and deliver a faster charge. In addition, the Charger has a built-in fan to cool the battery for faster and more efficient charging, even in hot weather conditions. For improved tool performance and extended battery life, Makita created STAR Protection Computer Controls. STAR Protection is communication technology that allows the tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over-discharging and overheating. Makita, the innovation leader in cordless tool technology, has the world's cordless tool line-up powered by an 18V lithium-ion slide-style battery.

## Features

- Integrated L.E.D. battery charge level indicator allows user to monitor battery charge
- Provides up to 35% more run time per charge compared to BL1830
- Reaches full charge in 40 minutes or less
- Compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool
- Battery delivers consistent power and run time in extreme temperatures, even in winter (-4°F/-20°C)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Makita |
| Part Number | BL1840 |
| Item Weight | 1.43 pounds |
| Product Dimensions | 3 x 6.75 x 6.5 inches |
| Item model number | BL1840B |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Size | 4.0Ah |
| Color | Black |
| Style | 1-Pack |
| Material | Plastic |
| Power Source | Hand Powered |
| Voltage | 18 Volts |
| Wattage | 72 watts |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Measurement System | Metric |
| Included Components | battery |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Ion |
| Battery Capacity | 4 Amp Hours |
| Warranty Description | Warranty |

## Product Details

- **Number of Batteries:** 1 Lithium Ion batteries required. (included)
- **Brand:** Makita
- **Battery Cell Composition:** Lithium Ion
- **Battery Capacity:** 4 Amp Hours
- **Recommended Uses For Product:** Power Tool

## Images

![Makita BL1840B 18V LXT Lithium-Ion 4.0Ah Battery, Black - Image 1](https://m.media-amazon.com/images/I/51qQIA7QUrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Makita Battery!
*by P***S on June 22, 2025*

This battery is not inexpensive compared to the ones made overseas. But you get what you pay for. This Makita lasts for at least 30 minutes on my weedeater in low RPM mode, which is what I use 90%of the time. I purchased an off brand for half of what the Makita costs and it was junk. Run time was maybe 10 minutes and it died after only 2 months. I will only stick with brand batteries if you want long lasting and powerful performance.

### ⭐⭐⭐⭐⭐ I Neede To Replace My Makita 18V Battery
*by V***R on June 26, 2025*

The Makita battery I received was well packaged and original equipment. I charged it up and it works perfectly. Great product.

### ⭐⭐⭐⭐⭐ Moma don't Take my Makita Drill Away - 4.0ah Makita Battery - just more of a good thing?
*by A***R on November 10, 2017*

Purchased this for my XDT08 impact drill, which originally came with a 3.0ah 18v battery. The package states that the battery fits Makita tools that have the star on the battery compartment OR a yellow colored battery receiver. It fits my drills just fine.The value is good for me, considering that a two pack of 3.0ah hour batteries was about $120 at the big orange store a year ago. I haven't seen these on sale retail lately, so it seemed prudent to get another battery before they go away.The first of some 18v 1.5ah batteries in our collection just died after about 2.5 years of light service (the ones that came with the black and white 18v tools). So far, all of our 3.0ah batteries that came with the black and teal colored Makita 18v tools are holding up great.Having the 18v impact driver tool has revolutionized the way we to the initial builds and mockups. Our little impact driver has driven many thousands of fasteners - from short to long deck screws up to longer structural wood screws without issues. It was also useful in deconstruction work. The 3.0ah hour batteries often go several days of moderate use and easily a day or two of heavy use in an impact gun. Longer runtimes of a regular Makita drill, such as mixing paint, generally drain any of the batteries much faster - we don't use the battery tools for mixing paint after the first couple of times. We'd feel a great loss to be without the Makita impact driver and its partner hammer drill / drill. If it doesn't break down, you'll have to pry it out of my cold, dead hand.Battery that we received was in factory retail Makita package, undamaged, and it is taking a charge just fine. If there are no issues in a few months, I will add a star, or report back with what happened. If it holds a charge, lasts, and works as well as the 3.0ah that came with the tools originally, I'm super satisfied.So far, so good!Update August 2018Still charging, still powering well. No issues. Adding star.

## Frequently Bought Together

- Makita BL1840B 18V LXT Lithium-Ion 4.0Ah Battery, Black
- Makita XBU03SM1 18V LXT® Lithium-Ion Brushless Cordless Blower Kit (4.0Ah)
- Makita XMT03Z 18V LXT® Lithium-Ion Cordless Multi-Tool, Tool Only

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**Shop now:** [https://www.desertcart.sk/products/21711154-makita-bl1840b-18v-lxt-lithium-ion-4-0ah-battery-black](https://www.desertcart.sk/products/21711154-makita-bl1840b-18v-lxt-lithium-ion-4-0ah-battery-black)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-24*