Best BLACK+DECKER Replacement Batteries

Updated January 2023
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom line
Best of the Best
Topbatt 3.6Ah Replacement Battery
3.6Ah Replacement Battery
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Certified BLACK+DECKER-compatible batteries with 18 volts of power; earns our home improvement expert's approval.


Performs longer than some OEM options and works with most cordless power tools that require lots of power and a lengthy charge, including tree trimmers. Usage is bolstered by the second battery.


May not fit with all BLACK+DECKER cordless tools.

Best Bang for the Buck
Powerextra HPB18 Replacement Battery
HPB18 Replacement Battery
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Our expert loves this product for its ability to hold a charge over extended yard work sessions.


The 3.7Ah design allows for the battery to hold a charge whether it is in use or not. Has overcharge and overcurrent safety features. Has a clip-in and -out feature that works well with most BLACK+DECKER products.


These batteries have a bit more weight to them than other products.

BLACK + DECKER 20V Max Powerconnect Battery
20V Max Powerconnect Battery
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Most Versatile
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With a design that allows for it to be used with multiple power tools, this battery earns our expert's praise.


Holds a charge for long periods of time even if the tool is not in use. Compatible with a wide variety of different tools. The switch allows it to pop in and out of different tools efficiently.


The smaller design may not work well with leaf blowers.

Munikind HPB18 Replacement Battery
HPB18 Replacement Battery
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Convenient Design
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Our expert's go-to pick thanks to the lithium pack that makes it light and long-lasting.


The lithium design allows the battery to hold a charge for extended periods of time. Works with the chargers that come with the power tools. Doesn't have a discharge effect that messes with the battery life span.


The casing doesn't always sit flush with some tools.

Forrat Upgraded 3600mAh Replacement Battery
Upgraded 3600mAh Replacement Battery
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Simple Yet Solid
Bottom Line

Engineered for landscape equipment and comes with 2 batteries to double the performance.


We love that this pack comes as a pair, extending the power twofold. Positive reviews for compatibility and ease of use. Works as expected. Ideal for light work around the yard.


Some batteries may experience short lived power.


We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

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Buying guide for Best black+decker replacement batteries

BLACK+DECKER is a popular power tool manufacturer, known for the quality and durability of their products. However, the lifespan of any battery is finite, and there will come a day when you need a new battery for your power tools.

You can purchase BLACK+DECKER batteries to replace your old ones, but they often come at a high price — original equipment manufacturer (or OEM) parts are almost always more expensive. Aftermarket batteries are more affordable, but finding quality batteries that fit your tools can be a challenge all its own.

Today, most of the aftermarket replacement parts are as good as or better than the original OEM parts, and many manufacturers list which specific BLACK+DECKER products their batteries are compatible with. Aftermarket batteries are often less expensive since you’re not paying for the name brand.

Keep reading our buying guide, and we’ll walk you through what you need to know about replacement batteries for BLACK+DECKER tools.

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Note that 20V Max and 18V batteries have the same voltage. The “Max” simply refers to the maximum amount of voltage the battery will store when it is fully charged.

Key considerations

18V or 40V

BLACK+DECKER’s cordless power tools typically use either 18V or 40V batteries, and your replacement battery should match the voltage of the OEM battery, whether you go with a BLACK+DECKER model or an aftermarket model.


BLACK+DECKER or aftermarket batteries should always hold a charge as long as the OEM originals while providing an equal amount of power to the tools.

Many aftermarket options actually exceed the OEM batteries on both counts. Take note of the capacity (measured in milliamp hours, or mAh) claimed by the manufacturer, but also read a few customer reviews to get an idea of whether the replacement battery will outperform the original.

Expert TIp
Remove batteries after charging and store them in a separate space where you can track them, so you don't mix them up with dead batteries.
BestReviews Home Improvement and DIY Expert


Battery types

The outer casing on all replacement batteries is the same hard plastic and the same metal prongs. The main differences are on the inside.

NiCad: BLACK+DECKER uses nickel-cadmium batteries, abbreviated to NiCad, in their 18V batteries. They were first invented in 1899, but they’ve been improved considerably since then. These batteries are used in a wide range of BLACR+DECKER power tools and are known for their fast charge times and low-temperature functionality.

These batteries can be recharged an impressive number of times, though every battery has its expiration date — as you certainly know. NiCad batteries also contain toxic metals and are difficult to dispose of safely, and they lack the power of other rechargeable batteries.

NiMH: Most aftermarket batteries are nickel-metal hydride, abbreviated NiMH. Research didn’t begin on these batteries until 1967, and it was 20 years before they were released in 1987.

These batteries generally boast high capacities and are unlikely to overcharge or over-discharge. In addition, they do not contain toxic metals.

NiMH batteries can be expensive, and they are not always compatible with BLACK+DECKER chargers. Their power will cut suddenly rather than slowing to a trickle, which may be a perk or an annoyance, depending on the tool you are using.

Lithium-ion: You probably know this battery type from your smartphone or laptop. This ubiquitous battery type is found in BLACK+DECKER’s 20V and 40V batteries and is known for its high capacity and ability to be recharged again and again. In addition, these batteries will hold their charge for long periods without use — a great thing to have in the battery of a power tool.

However, these batteries are not as powerful as their NiCad and NiMH counterparts. Because this is a newer type of battery, dating back to 1980, production costs for these batteries are high — and in turn, lithium-ion batteries are fairly expensive. In addition, lithium-ion batteries contain toxic metals and can be difficult to dispose of or recycle.

Expert Tip
If budget allows, buy a charger that has a battery life indicator on it. This will end the guessing game, and you won't need to click batteries in and out.
BestReviews Home Improvement and DIY Expert

Temperature protection

Batteries release energy through chemical reactions. The reactions are often exothermic; that is, they generate heat as a byproduct. Some replacement batteries may have built-in temperature protection to extend the lifespan of the battery.


One of the most important factors is whether an aftermarket battery will fit in your array of 18V or 40V tools. Aftermarket manufacturers are well aware of this concern and will often list compatible BLACK+DECKER power tools. In the event that you receive an incompatible battery, you should contact the manufacturer, especially if they listed your particular BLACK+DECKER tools as compatible.

BLACK+DECKER replacement battery prices


Basic aftermarket batteries are available for $18 to $25. These are usually single-pack replacement NiCad batteries. As long as you are comfortable with an aftermarket battery, there are many reliable products in this price range that may work well for your needs.


Moderately priced aftermarket batteries cost between $25 to $30. These are mostly two-packs of replacement NiMH batteries that deliver solid performance and reliability.

Expert Tip
Have no less than two or three batteries on hand so you can always have one charging.
BestReviews Home Improvement and DIY Expert


BLACK+DECKER replacement batteries start at $30 and may cost up to $70. A single 18V battery costs around $30, while a single 40V battery costs closer to $45. Two packs cost around $40 for 18V batteries and around $60 for 40V batteries.


  • The existing battery on your power tool normally covers up the model number of the tool. Remove the battery from the tool and look inside the battery compartment — the model number of the tool will be three red letters followed by a few numbers.
  • When you first get your replacement battery, compare it side-by-side with the old battery. They need to be the same size and shape in order for it to fit. The weight may differ if the batteries are of different types.
  • Replacement batteries should always be put in the charger when you first purchase them to ensure they have a full charge. Once they are recharged, insert them into the battery compartment in the tool. You should hear a soft click telling you the battery is firmly connected.
Expert Tip
Put a sticker on each battery with the date of purchase so you know which ones are older and you can track their performance.
BestReviews Home Improvement and DIY Expert
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As long as the replacement 20V battery is the same size and shape as your old OEM 18V battery, you can use a 20V battery in place of an 18V battery.


Q. Will using an aftermarket battery void the warranty of my BLACK+DECKER tools?

A. No. As long as you only use batteries whose voltage matches the OEM battery, you will not void the warranty.

Q. How long will an 18V battery last during use?

A. The runtime of most 18V batteries is about 50 minutes of continuous use.

Q. Can I leave the battery on the charger when it’s not in use?

A. No. Overcharging the battery can damage it and shorten its useful life.

Q. Are rechargeable batteries sealed and safe to use in the rain?

A. No — as with any electric equipment, there is always a risk of damaging the equipment or electrocuting yourself if you use power tools in the rain.

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