---
product_id: 20552953
title: "BL1840B-2 18V LXT Lithium-Ion 4.0Ah Battery Twin Pack, Black"
brand: "makita"
price: "1319.48 DT"
currency: TND
in_stock: true
reviews_count: 11
category: "Makita"
url: https://www.desertcart.tn/products/20552953-bl1840b-2-18v-lxt-lithium-ion-4-0ah-battery-twin
store_origin: TN
region: Tunisia
---

# 18V LXT power 4.0Ah high capacity 40-min rapid charge BL1840B-2 18V LXT Lithium-Ion 4.0Ah Battery Twin Pack, Black

**Brand:** makita
**Price:** 1319.48 DT
**Availability:** ✅ In Stock

## Summary

> 🔋 Power through your day with Makita’s fastest-charging, longest-lasting battery twin pack!

## Quick Answers

- **What is this?** BL1840B-2 18V LXT Lithium-Ion 4.0Ah Battery Twin Pack, Black by makita
- **How much does it cost?** 1319.48 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/20552953-bl1840b-2-18v-lxt-lithium-ion-4-0ah-battery-twin)

## 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

- • **Unmatched Runtime Boost:** 35% more work time per charge keeps your projects moving nonstop.
- • **Durable Lithium-Ion Power:** Resists self-discharge and overheating for reliable power when you need it most.
- • **Rapid Recharge Technology:** Get back to work in 40 minutes or less with industry-leading fast charging.
- • **Smart LED Charge Indicator:** Stay in control with an integrated LED that shows battery life at a glance.
- • **Star Protection Compatibility:** Seamlessly pairs with Star Protection tools for optimized performance and safety.

## Overview

The Makita BL1840B-2 is a twin pack of 18V LXT Lithium-Ion 4.0Ah batteries designed for professional-grade cordless tools. Featuring 35% more runtime than previous models and a rapid 40-minute charge time, these batteries include an integrated LED charge indicator and exclusive Star Protection technology to prevent overloading and overheating. Engineered for durability and compatibility with Makita’s Star Protection tools, this battery pack ensures maximum productivity and reliability on every job.

## 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.

Review: Makita batteries seem more expensive than pretty much any other brand or device but I think ... - Makita batteries seem more expensive than pretty much any other brand or device but I think you get what you pay for. I have never had an issue with these or any Makita branded batteries. They charge very fast and last long enough to charge up the other one (depending on the device you are powering.) The 4.0Ah version is the same size and weighs as much as the 3.0Ah as far as I can tell, only difference is of course longer run time and longer charge time. I like the inbuilt power indicator which my old ones do not have. At this point I've got 4 Makita batteries so I might not need more until one of these dies or fails to hold a charge. Like I said, the quality and track record has been top notch so I don't expect I'll have to get more any time soon.
Review: Won’t fit older non star rated tools - I bought these to use as a back up for a new battery powered chop saw, along with be my primary batteries for my little used 6” circular saw. Turns out they didn’t for the latter. The saw didn’t have the star emblem under the base, so these didn’t fit........or did they? Upon some internet searching, checking them in other tools, and comparing them to batteries that fit, the reason they didn’t fit was an extra tab on the battery that prohibited their full insertion into non star tools. Let’s just say removing that tab was easy as pie and now they work where I wanted them to work. I also am sure I voided their warranty. The reason for the tab it to keep them from being used in tools that will discharge them too quickly, causing them to get hot (when used for extended times, not my usage) and therefore damaging the longevity of the batteries. Still a great deal, and I’d do it again if I needed batteries. They are exactly what they were meant to be. Don’t take my misuse as a promotional for doing the same......wink.

## Features

- Integrated L.E.D. battery charge level indicator allows user to monitor battery charge
- 18V LXT Lithium-Ion 4.0Ah battery BL1840B provides up to 35% more run time per charge compared to BL1830
- 18V LXT Lithium-Ion 4.0Ah battery BL1840B reaches full charge in 40 minutes or less
- 18V LXT Lithium-Ion 4.0Ah battery BL1840B is compatible with 18V LXT Tools
- Compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B015PVD9OC |
| Amperage | 4 Amps |
| Antenna Location | Power Tool |
| Battery Capacity | 4 Amp Hours |
| Battery Cell Composition | Lithium Ion |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 1360.78 Grams |
| Best Sellers Rank | #104,860 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,281 in Cordless Tool Battery Packs |
| Brand | Makita |
| Built-In Media | (2) 18V LXT® Lithium-Ion 4.0Ah Battery |
| Compatible Phone Models | XFD10 XDT13 XPH14 XFD13 |
| Customer Reviews | 4.7 out of 5 stars 492 Reviews |
| Global Trade Identification Number | 00088381463904 |
| Item Dimensions | 3 x 6.75 x 9.75 inches |
| Item Weight | 4.96 ounces |
| Manufacturer | Makita |
| Model Name | Lithium battery |
| Model Number | BL1840B-2 |
| Number of Batteries | 2 Lithium Ion batteries required. (included) |
| Recommended Uses For Product | Power Tool |
| UPC | 712714384191 088381463904 |
| Unit Count | 2.0 Count |
| Voltage | 120 |
| Warranty Description | 3-year limited warranty |

## Product Details

- **Battery Capacity:** 4 Amp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** Makita
- **Number of Batteries:** 2 Lithium Ion batteries required. (included)
- **Recommended Uses For Product:** Power Tool

## Images

![BL1840B-2 18V LXT Lithium-Ion 4.0Ah Battery Twin Pack, Black - Image 1](https://m.media-amazon.com/images/I/616texzq4FL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Makita batteries seem more expensive than pretty much any other brand or device but I think ...
*by C***L on May 19, 2017*

Makita batteries seem more expensive than pretty much any other brand or device but I think you get what you pay for. I have never had an issue with these or any Makita branded batteries. They charge very fast and last long enough to charge up the other one (depending on the device you are powering.) The 4.0Ah version is the same size and weighs as much as the 3.0Ah as far as I can tell, only difference is of course longer run time and longer charge time. I like the inbuilt power indicator which my old ones do not have. At this point I've got 4 Makita batteries so I might not need more until one of these dies or fails to hold a charge. Like I said, the quality and track record has been top notch so I don't expect I'll have to get more any time soon.

### ⭐⭐⭐⭐⭐ Won’t fit older non star rated tools
*by E***. on May 13, 2020*

I bought these to use as a back up for a new battery powered chop saw, along with be my primary batteries for my little used 6” circular saw. Turns out they didn’t for the latter. The saw didn’t have the star emblem under the base, so these didn’t fit........or did they? Upon some internet searching, checking them in other tools, and comparing them to batteries that fit, the reason they didn’t fit was an extra tab on the battery that prohibited their full insertion into non star tools. Let’s just say removing that tab was easy as pie and now they work where I wanted them to work. I also am sure I voided their warranty. The reason for the tab it to keep them from being used in tools that will discharge them too quickly, causing them to get hot (when used for extended times, not my usage) and therefore damaging the longevity of the batteries. Still a great deal, and I’d do it again if I needed batteries. They are exactly what they were meant to be. Don’t take my misuse as a promotional for doing the same......wink.

### ⭐⭐⭐⭐⭐ Oem
*by D***Y on March 19, 2026*

With so many knock off products being peddled, these are the real Makita products.

## Frequently Bought Together

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-17*