Search  for anything...

20V 4.0Ah Battery for Black and Decker Lithium-Max Tools 2-Pack

Based on 413 reviews
Condition: New
Checking for the best price...
$39.99
Save $6.00 was $45.99

Buy Now, Pay Later


As low as $9 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Nov 2
Order within 3 hours and 27 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Model
LBXR20-4A-2
Battery Capacity
4 Ah
Voltage
20 volts
Reusability
Rechargeable
Amperage
4 A
Battery Weight
14.4 oz
In the box
1 x Instruction manual2 x 20V 4.0Ah battery
Warranty
12 months warranty
Works with
Compatible with 20v BLACK+DECKER Power Tools, Original Chargers,Outdoor Equipment and 20V Vacuums, Drills,Trimmers, Leaf blowers

Features 5

  • 20V 4.0Ah Lithium Battery Specs:High-performance 20V lithium-ion batteries designed for long runtime and stable power delivery. Each 4.0Ah pack provides reliable energy for Black and Decker 20V Max cordless tools, making it a strong replacement option for daily use.
  • Compatible with Black and Decker 20V Tools & Chargers:Engineered to fit Black and Decker 20V Max tools such as drills, leaf blowers, hedge trimmers, weed eaters, sanders, vacuums, and more. Also works with Black and Decker 20V Max lithium battery chargers for seamless use.
  • Supports a Wide Range of Models:Works with many 20V Black and Decker tool models including BDCDMT120, CHH2220, LDX120SB, LHT2220, LST120, LST220, LSW20, LPHT120, LPP120, LCS120, LLP120, LSW120, SSL20SB, and others. Additional supported models listed in the product details.
  • Built-In Protection for Safe Performance:Equipped with over-voltage, over-current, over-heat, and over-charge protection for safe operation. Designed with high-quality lithium cells and tested to meet CE, FCC, and RoHS standards for dependable performance.

Description

Engineered to work seamlessly with the Black & Decker 20V MAX battery platform, this replacement battery delivers reliable power across a wide range of cordless tools for home, yard, and DIY projects. Compatible Battery Models: LB20, LBX20, LBX4020, LB2X4020, LBXR20, LBXR20-OPE, LBXR2020-OPE, LB2X3020-OPE, LBXR2520, LBXR20B-2, LBXR20BT. Compatible Tool Categories Include: String trimmers, edgers, hedge trimmers, drills, impact drivers, chainsaws, pole saws, circular saws, reciprocating saws, lawn mowers, power tillers, vacuums, and other 20V MAX cordless tools. Replacement battery designed for compatibility with Black & Decker 20V MAX tools and chargers. Not an OEM product. Is this battery compatible with my Black & Decker 20V MAX tools? Yes. This replacement battery is fully compatible with Black & Decker 20V MAX cordless tools and chargers, including models using LB20, LBX20, LBXR20, LBX4020, and more. If your tool uses the 20V MAX battery platform, it will fit and work properly. How long does the battery last on a full charge? The high-capacity design delivers longer runtime than standard batteries, reducing recharge frequency for yard work and DIY projects. Actual runtime varies by tool and workload, but most users enjoy extended use per charge. Is this battery safe to use with my tools? Absolutely. The battery is built with an advanced protection system to guard against overcharging, overheating, over-current, and short circuits. It has been tested to meet FCC, CE, and RoHS standards for reliable daily use. Will it work with my original Black & Decker charger? Yes. This battery is designed to be fully compatible with original Black & Decker 20V MAX chargers, allowing you to charge it just like the original battery—no special charger required. Is this an original Black & Decker battery? No. This is a high-quality replacement battery, not an OEM product. It is engineered to match the performance and fit of Black & Decker 20V MAX batteries while offering a more cost-effective alternative. For premium products and expert support day or night, count on us. Our team is available 24/7 to ensure your satisfaction. Power your tools with confidence using BATWAYPRO batteries. We engineer reliable, durable batteries that provide long-lasting energy to maximize productivity. Rigorously tested and FCC/CE certified for safety, they offer peace of mind. A stable BATWAYPRO battery reduces strain on your tools, helping to extend their life and maximize your investment. Yes, they are. Our batteries are engineered with high-grade materials and undergo rigorous testing to ensure durability and safety, including protections against over-charging and overheating. This focus on quality construction is central to our design process.

Specs 16

Number of Batteries 2 Nonstandard Battery batteries required. (included)
Brand BATWAYPRO
Battery Cell Composition Lithium Ion
Battery Capacity 4 Ah
Recommended Uses For Product Power Tool
Model Number LBXR20-4A-2
Model Name Lithium Battery
UPC 717813831010

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


Great Replacement Batteries with Excellent Runtime
These replacement batteries have been a great value. They fit my Black+Decker 20V power tool perfectly and clicked into place just like the original batteries. Charging was straightforward, and both batteries have been performing reliably. The 4.0Ah capacity provides noticeably longer runtime, so I can get more work done before needing to recharge. I've used them with several different tools, and they've delivered consistent power throughout the job. For the price, getting a two-pack is an excellent deal. If you're looking for dependable replacement batteries that are compatible with Black+Decker 20V tools, these are definitely worth considering. ... show more
Reviewed in the United States on July 29, 2026 by AJ

Great Buy!
Purchased these for my mom so she would have extra batteries for her Black & Decker products. She loves them and now never worries about running out of juice. The sad part is that her yard is quite small (its a townhome with a small patch of grass in the front only). Its amazing the original batteries dont last longer than 15 min. At least with these it gives her an extra hour or so. Good to have! These work great, quick and easy to charge, and last! ... show more
Reviewed in the United States on October 5, 2026 by Mouse

Work nice
I bought this pack of two BATWAYPRO 20V and 4.0Ah batteries, and the truth is that they exceeded my expectations. They fit perfectly into my Black and Decker tools, just like the original ones. The battery life is incredible thanks to its 4.0Ah; it allows me to work for much longer without having to interrupt my project to recharge. In addition, the price is excellent for a two-unit package. Highly recommended for anyone looking for a high-quality replacement without spending a fortune. ... show more
Reviewed in the United States on September 8, 2026 by Cindi Perera

Nice
Work great!!!!
Reviewed in the United States on September 1, 2026 by Edgell

Great Replacement Batteries
I bought these to replace the batteries for my Black & Decker tools, and I’m happy with my purchase. It’s nice having two batteries so I can keep a spare handy when I’m working on projects around the house. They’re convenient to have, and I like being able to keep using my tools without having to buy new ones. I've used and recharged them many times with noticing any loss of power or length of use time. Overall, a good purchase for the money! ... show more
Reviewed in the United States on October 14, 2026 by MICHAEL BEAN

Works as Needed to Replace LBXR20
My old B&D batteries (ca 2017) were apparently giving up, only lasting 5-10 minutes, and I had a choice to get a new trimmer or new batteries. I just didn’t want to spend a lot. So, these 2 replacements were cheaper than a single “genuine” B&D battery and I thought I’d give them a try. Pros: Exact replacement for a B&D LBXR20, fit the trimmer, fit the charger, charged, last long enough to trim my ½ acre yard, no weight difference. Cons: None. Summary: I haven’t timed exactly how long a charge lasts, but the trimmer is working like new. As others stated, I’m not concerned if it lasts 4 hours (the old batteries were 1.5AH), just that it lasts long enough to trim the yard. So far, so good. If anything changes, I’ll update my review. Note: Side by side comparison photos of the original battery to the right, or bottom, and one of these (more red than orange). Buy again: Yes, if needed. ... show more
Reviewed in the United States on August 17, 2026 by Thomas

Great value for the price!
Bought this 2-pack for my Black+Decker 20V tools. Both batteries fit perfectly and charge on the original charger. Runtime is much better than my old 1.5Ah batteries. Great value for the price!
Reviewed in the United States on October 8, 2026 by Renata

Good replacement for a good price
Bought these to replace my original ones which were no longer holding a charge. They have worked great. I use them in my weed eater and last through two/three times before needing switching out.
Reviewed in the United States on October 10, 2026 by Mark Sublett
Checking for best price...