---
product_id: 185846379
title: "4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries"
brand: "dutyone"
price: "₨18461"
currency: LKR
in_stock: true
reviews_count: 8
category: "Dutyone"
url: https://www.desertcart.lk/products/185846379-4000mah-20v-replacement-for-black-and-decker-20v-battery-compatible
store_origin: LK
region: Sri Lanka
---

# 20V powerful voltage 4000mAh high capacity Advanced multi-protection safety 4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries

**Brand:** dutyone
**Price:** ₨18461
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your projects with unstoppable energy!

## Quick Answers

- **What is this?** 4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries by dutyone
- **How much does it cost?** ₨18461 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/185846379-4000mah-20v-replacement-for-black-and-decker-20v-battery-compatible)

## Best For

- dutyone enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Supports up to 500 charge cycles, keeping your tools ready when you are.
- • **Safety First, Always:** RoHS & CE certified with overcharge, overheat, and short-circuit protection.
- • **Seamless Compatibility:** Perfect fit for Black & Decker 20V tools—no hassle, just plug & play.
- • **Confidence in Every Charge:** Backed by 15 months of quality service and 24/7 customer support.
- • **Longer Runtime, Less Downtime:** 4000mAh capacity delivers extended power for all-day productivity.

## Overview

This Dutyone 4000mAh 20V lithium-ion replacement battery is engineered for Black & Decker cordless tools, offering longer runtime and reliable performance. Featuring advanced safety protections and compatibility with original chargers, it ensures your power tools stay charged and ready through up to 500 recharge cycles. With a 15-month warranty and responsive customer service, it’s the smart, cost-effective upgrade for professionals who demand efficiency and peace of mind.

## Description

Dutyone 4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries - desertcart.com

Review: Fits and works properly - I got this battery to replace my Black & Decker cordless drill battery and it fits perfectly and it works just like it’s supposed to like it’s the original battery. I would definitely recommend this battery for the price if you need a replacement.
Review: Solid Replacement - This replacement battery is a great value option for my Black and Decker tools. A original replacement battery was about 5x more than this. It fits perfectly and holds a charge well.

## Features

- Battery Sepcs: Battery type: Lithium-ion, Voltage: 20V, Capacity: 4000mAh.
- Wide Compatibility: This is not an original battery, Good replacement battery for Black&Decker LBXR20 LB20 LBX20 LBX4020 Cordless Tool Battery, also work for the original lithium charger .
- Upgrade battery: Compatible with black and decker 20v 4.0Ah lithium battery Li-ion rechargeable battery has Longer runtime and improved performance, holds a charge for up to 500 times, easy to install and remove.
- Superior Safety: Pass RoHS and CE security tests with over-charge, over-discharge, over-voltage, over-current and over-heating protections. Made of the good materials and cells to make sure its safety and stability, no memory effect.
- Buy with confidence: All products come with 15 months quality services, 24*7 hours prompt customer services.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B082KHDQKG |
| Amperage | 4 Amps |
| Antenna Location | Power Tool |
| Battery Capacity | 3600 Milliampere Hour (mAh) |
| Battery Cell Composition | Lithium Ion |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 342 Grams |
| Best Sellers Rank | #474,707 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4,138 in Cordless Tool Battery Packs |
| Brand | Dutyone |
| Customer Reviews | 4.4 out of 5 stars 633 Reviews |
| Item Weight | 0.38 Kilograms |
| Manufacturer | Dutyone |
| Number of Batteries | 1 Nonstandard Battery batteries required. (included) |
| Recommended Uses For Product | Power Tool |
| Reusability | Rechargeable |
| UPC | 795274664163 |
| Unit Count | 1 Count |
| Voltage | 20 Volts |
| Warranty Description | 1 |

## Product Details

- **Battery Capacity:** 3600 Milliampere Hour (mAh)
- **Battery Cell Composition:** Lithium Ion
- **Brand:** Dutyone
- **Number of Batteries:** 1 Nonstandard Battery batteries required. (included)
- **Recommended Uses For Product:** Power Tool

## Images

![4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries - Image 1](https://m.media-amazon.com/images/I/619WtrOSDeL.jpg)
![4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries - Image 2](https://m.media-amazon.com/images/I/61AsbJpqlWL.jpg)
![4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries - Image 3](https://m.media-amazon.com/images/I/61RvuQ9005L.jpg)
![4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries - Image 4](https://m.media-amazon.com/images/I/61Y4CuP00mL.jpg)
![4000mAh 20V Replacement for Black and Decker 20V Battery, Compatible with LBXR20 LB2X4020-OPE LBX20 LST220 LB20 LBX4020 LBXR2020-OPE LBXR20B-2 Cordless Tool Lithium Ion Batteries - Image 5](https://m.media-amazon.com/images/I/61duQxNJYmL.jpg)

## Questions & Answers

**Q: I received  2 dutyone  20v  3600 mah li-on batteries with an adapter & charger on 4/19/2021 a b&d hedge trimmer now what?that no longer charge fully.**
A: Don't know. I have one charger and two batteries for an extension-pole hedge trimmer that have not missed a beat for years. R U sure the charger is charging? Might take a voltage meter and figure out whether your problem is charger or batteries. With two batteries going bad at the ~ same time I would suspect the charger is bad.

**Q: Is this compatible with a Maxlander leaf blower?**
A: The Maxlander battery must be compatible with the Black and Decker 20V battery, which I don't think it is.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits and works properly
*by M***I on July 31, 2025*

I got this battery to replace my Black & Decker cordless drill battery and it fits perfectly and it works just like it’s supposed to like it’s the original battery. I would definitely recommend this battery for the price if you need a replacement.

### ⭐⭐⭐⭐⭐ Solid Replacement
*by J***N on August 4, 2025*

This replacement battery is a great value option for my Black and Decker tools. A original replacement battery was about 5x more than this. It fits perfectly and holds a charge well.

### ⭐⭐⭐⭐⭐ Could have been better
*by J***S on January 6, 2024*

**Update** After writing this, Alan from the seller contacted me and asked if I wanted a full refund. With excellent customer service like this, I rate the transaction as superior.*** This fits and operates well but I am disappointed with relative longevity of the battery in operation. I have a vacuum which seemed to last long at first but after 3 months it fails to complete the same tasks that the original battery did. Considering that this has greater amperage, it is a disappointment.

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**Shop now:** [https://www.desertcart.lk/products/185846379-4000mah-20v-replacement-for-black-and-decker-20v-battery-compatible](https://www.desertcart.lk/products/185846379-4000mah-20v-replacement-for-black-and-decker-20v-battery-compatible)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-01-29*