---
product_id: 310546318
title: "KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery Compatible for Black and Decker 20V Lithium Battery MAX LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LBX4020 LST220"
brand: "kunlun"
price: "332 Lei"
currency: RON
in_stock: true
url: https://www.desertcart.ro/products/310546318-kunlun-6-5ah-20-volt-lb2x4020-replacement-battery-compatible-black
store_origin: RO
region: Romania
---

# 6500mAh Capacity 20V Power Universal Fit KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery Compatible for Black and Decker 20V Lithium Battery MAX LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LBX4020 LST220

**Brand:** kunlun
**Price:** 332 Lei
**Availability:** ✅ In Stock

## Summary

> 🔧 Power Up Your Projects with Confidence!

## Quick Answers

- **What is this?** KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery Compatible for Black and Decker 20V Lithium Battery MAX LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LBX4020 LST220 by kunlun
- **How much does it cost?** 332 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/310546318-kunlun-6-5ah-20-volt-lb2x4020-replacement-battery-compatible-black)

## Best For

- kunlun enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Certified protection against overcharging and overheating.
- • **Easy Installation:** Designed for hassle-free swapping with no fatigue.
- • **Unleash the Power:** Experience 20V of pure energy for your tools.
- • **Universal Compatibility:** Works seamlessly with all Black & Decker 20V tools.
- • **Long-Lasting Performance:** 6500mAh capacity means you work longer, play harder.

## Overview

The KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery is a high-performance lithium-ion battery designed for Black and Decker 20V cordless tools. With a robust capacity of 6500mAh, it offers double the duration compared to standard batteries, ensuring you can tackle any project without interruption. Its safety certifications and easy installation make it a reliable choice for both professionals and DIY enthusiasts.

## Description

KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery Compatible for Black and Decker 20V Lithium Battery MAX LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LBX4020 LST220

## Features

- 【LB2X4020 Replacement Battery】: Cell Type: Lithium-ion | Voltage: 20V | Capacity: 6500mAh | Removable & Rechargeable | Made with the highest quality cells and last 2X longer duration than the LBXR2020 ;
- 【Widely Compatibility】: Compatible for ALL BLACK+DECKER 20 Volt Max lithium-ion cordless tools and chargers, replace for Black and Decker 20V lithium LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LB2X4020 LB2X4020-OPE LST220 batteries;
- 【Easy to Install and Remove】: A bit heavier and thicker than the original battery, but still not increase user fatigue. No memory effects, can be charged or discharged as needed without loss of capacity. Offers longer-lasting performance and durability;
- 【Safety & Reliable】: The lithium-ion battery is CE, FCC, RoHS certified, built-in over-charge, over-discharge, over-voltage, over-current, and over-heating protection, safety for the batteries and your tools;
- 【Product Service】: 30 days money-back service. Contact us: please click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller".

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 640 Grams |
| Battery Weight | 640 Grams |
| Unit Count | 1 Count |
| Battery Cell Type | Lithium Ion |
| Recommended Uses For Product | For Black and Decker 20V cordless tools |
| Reusability | Rechargeable |
| Battery Capacity | 6500 Milliamp Hours |
| Amperage | 6.5 Amps |
| Voltage | 20 Volts |
| Compatible Phone Models | Compatible for all Black and Decker 20V cordless tools |

## Product Details

- **Number of Batteries:** 1 Lithium Ion batteries required. (included)
- **Brand:** KUNLUN
- **Battery Cell Composition:** Lithium Ion
- **Compatible Phone Models:** Compatible for all Black and Decker 20V cordless tools
- **Recommended Uses For Product:** For Black and Decker 20V cordless tools

## Images

![KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery Compatible for Black and Decker 20V Lithium Battery MAX LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LBX4020 LST220 - Image 1](https://m.media-amazon.com/images/I/71nYbkRcGPL.jpg)

## Questions & Answers

**Q: how much does the battery weigh?**
A: I weighed my 20 volt 6.5 amp hour battery for you. It weighs 635 grams (1.39 pounds or 22.39 ounces). For comparrison, my standard 20 volt 1.5 amp hour battery weighs 367 grams (0.8 pounds or 12.9 ounces). Yes, it adds weight to whatever tool you are using but well worth it for the major increase in run time. Hope this helps and answers your question.

**Q: Will this battery work with  black+decker powerseries extreme cordless stick vacuum cleaner, (bsv2020g)?**
A: It will work with any B+D tool that uses a 20V Max Lithium battery as a power source. If your B+D cordless stick vac uses a 20V Max Lithium battery, then this battery should work with it. If your stick vac uses some other power source, such as a different voltage, then this battery will not work.

**Q: I am charging it using black and decker charger and green light is blinking… what does it mean?**
A: I don't know what type of Black & Decker charger you are using. There are different kinds and different voltages. Does yours also have a red light or does it only have one green light. If there is only one green light, most likely it is just flashing to show it is charging. Some chargers also flash if the connection to the battery is not good. Try cleaning the metal contacts and start again. Try making sure the charger is pushed completely onto the battery. If the battery is very cold it could effect charging. Bring it to a warmer temperature and try again. Some chargers are not meant for lithium batteries and the charger will also flash then. I use a stand up Black & Decker quick charger and I have not had any problems. I hope this has helped.

**Q: Will this battery work on the Hercules 20 volt power tools from Harbor Freight?**
A: I don't have any experience with Harbor Freight tools but I am not aware of any tool company that has interchangeable batteries. From my experience, batteries have been brand specific.

## Frequently Bought Together

- KUNLUN 6.5Ah 20-Volt LB2X4020 Replacement Battery Compatible for Black and Decker 20V Lithium Battery MAX LBXR20 LB20 LBX20 LBXR2020-OPE LBXR20B-2 LBX4020 LST220
- KUNLUN LCS1620 20V Lithium Battery Charger Compatible for Black & Decker 20V Lithium Battery LBXR20 LBXR20B LBXR20-OPE LB20 LBX20 LBX4020 LB2X4020 LBXR2020-OPE BL1514 LBXR16 LST220

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-11*