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Makita

Makita BL1850B-2 18V LXT Lithium-Ion 5.0Ah Battery, 2/pk, Black

  • Based on 8,085 reviews
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Availability: In Stock.
Fulfilled by Jeff’s garage
Arrives Friday, Mar 6
Order within 1 hour and 38 minutes
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Style: 2-pack Batteries


Features

  • Integrated L.E.D. battery charge level indicator allows user to monitor battery charge
  • Provides up to 65% more run time per charge compared to BL1830
  • Reaches full charge in 45 minutes or less
  • Makita BL1850B-2 18V LXT Lithium-Ion 5.0Ah Battery, 2/pk

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 5.0Ah battery (BL1850) 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.

Number of Batteries: 2 Lithium Ion batteries required.


Brand: Makita


Battery Cell Composition: Lithium Ion


Battery Capacity: 5 Amp Hours


Recommended Uses For Product: Vacuum Cleaner


Product Dimensions: 4.25 x 6.75 x 9.75 inches


Item Weight: 1.41 pounds


Item model number: 197288-2


Batteries: 2 Lithium Ion batteries required.


Is Discontinued By Manufacturer: No


Date First Available: September 3, 2015


Manufacturer: Makita


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Mar 6

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.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Very durable
Style: Two Batteries
I get a LOT of charge-discharge cycles from these batteries. Expensive but very durable.
Reviewed in the United States on February 19, 2026 by lawrence
    • Batteries
Style: Two Batteries
Great quality. Delivery was fast and love my products
Reviewed in the United States on December 15, 2025 by Donna
    • A great investment for anyone looking for long-lasting performance.
Style: Two Batteries
I’ve had these Makita batteries for over a decade, and they still charge well and work reliably. I truly love Makita tools — this product has proven to be both durable and dependable over time. A great investment for anyone looking for long-lasting performance.
Reviewed in the United States on July 20, 2025 by Esteban
    • You can use the BL1850 on older non compatible tools that used the BL1830 battery if...
Style: Two Batteries
These batteries will not fit the older tools that have the black battery receiver plate without the star on it unless you file, cut or grind off the wee little tab on the tool receiver plate that keeps the battery from sliding on. I cut it off by hand using a jigsaw blade on 5 of my tools in less than 10 minutes. These older tools used the the BL1830 battery. The older tools had only two contacts instead of three like the newer tools that have the yellow receiver plate with or with out the star or black receiver plate with the star. The extra contact is so the battery and tool can communicate allowing the battery to shut off if the tool is over loaded or the battery is drained past a set point. Running a tool without this communication feature until the battery is dead will shorten battery life. Over loading a tool creates heat that is bad for the tool and battery life. The ideal situation is to use and store the batteries at room temperature as leaving them in your truck with the windows up on a 100 degree day with the windshield facing the sun is not good for them. Heat is bad for the batteries. If you have to lock them up in a situation like this, a cooler bag with an ice pack would help. On the other hand cold temperatures reduce battery capacity and using the battery when it is below 0 Fahrenheit is not ideal for battery life either. There is no memory effect with these batteries so top them off while using them and before storing them is a good idea because storing them in a discharged state is bad for battery life and like I said running the battery until it is dead is also bad. If you are going on an extended vacation have someone charge your batteries at least once every 3 months or risk harming the battery. Do not leave the batteries on the charger for ever. Take them off as soon as you can after they are charged. In the real world you have to get the job done but to the extent that you can follow these rules your batteries will last longer. I have had some BL 1830 batteries last up to 5 years but some didn't make it that long and did I follow my own advise? Not always by any means! So you might wonder why that little tab is on the tool battery receiver plate of some of the tools. It was to keep people from using the little BL1815 batteries on high drain tools. The discharge rate could be too high for the little batteries. I had to tease all this information out of the Makita tech people as there is no way they will advise cutting off the tab on your tool for all the reasons that you could imagine but they had no information as to why it would be a bad idea either which is their way of saying go ahead and do it but we don't want to know about it. All my tools are out of warranty anyway. I have seen several reports of people cutting the tab on their tools and not having any problems with using the BL1850 battery. Just keep in mind that the two electrical connector tools are not talking to the battery like the tools with three connectors so you need to be a little smarter about how you use them if you want to optimize your battery life. Do not drain the battery all the way and do not push the tool especially with a low battery. Some people have said their drills spin faster with this battery or their reciprocating saws have more power than with the BL1830 battery but I think what they are experiencing is as the battery ages and gets near the end of its life the batteries can not provide the same amperage (drain rate) or amp hours (capacity) as when they are new. If you compared the performance of this battery to a new BL1830 in a drill you should see the same rpm and of course a longer run time.You will also see reviews saying the batteries last twice as long or three times as long but again I think these people are comparing well used batteries to new ones. I am going to the charger a lot more often with my older batteries because they do not have the same capacity as when they were new. If you are comparing new batteries you should get 65% more run time as Makita advises. The warranty is now 3 years on the batteries so I imagine Makita has reason to believe the communication feature will improve battery life and that could be one of the reasons why they don't want you to use the battery with tools that do not have the third connector. Enjoy less trips to the charger ... show more
Reviewed in the United States on December 22, 2015 by Robert Starke
    • Drunk with POWER! A bit more expensive but totally worth it.
Style: Two Batteries
Nothing like the real thing. I have several Makita compatible batteries but they don't do as well as the original ones. The 5.0Ah is great for my mini leaf blower or other tools that have a high current drain. They also run much longer, I rarely have to swap out a battery.
Reviewed in the United States on December 1, 2025 by Bobn
    • You get what you pay for.
Style: Two Batteries
Can't go wrong with the OEM battery. Little spendy but you get what you pay for. Hard to find a deal on these but they are better built and retain there chargability unlike the knock offs.
Reviewed in the United States on November 16, 2025 by JeffM
    • Shiny and New!
Style: Two Batteries
Arrived hand-wrapped in plastic. I prefer to use authentic Makita batteries, as these seem to be, despite the aftermarket looking packaging. Hold a charge and power the tools as expected.
Reviewed in the United States on January 16, 2026 by Stagehand Jim
    • Fits makita
Style: Two Batteries
Fits well with makita . Keeps a charge and very pleased with our purchase.
Reviewed in the United States on February 6, 2026 by Amy Smith

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