Model#: MKTNBL1850B-2

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
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New or Recon items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Makita BL1850B-2 18V LXT 5.0 Ah Lithium-Ion Battery (2 Pc)

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  • Makita BL1850B-2 18V LXT 5.0 Ah Lithium-Ion Battery (2 Pc)
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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.

Product Overview


The Makita 18V 4.0 Ah LXT Lithium-Ion Battery charges faster and works longer than standard compact Lithium-Ion batteries. It gives you and your cordless tools unmatched performance and productivity to take on the most demanding applications.
  • Integrated LED battery charge level indicator allows user to monitor battery charge.
  • Reaches full charge in 45 minutes or less
  • Compatible only with Star Protection tools indicated by the Star Symbol and/or Yellow Battery Receiver under the tool
  • Battery delivers consistent power and run time in extreme temperatures even in winter
  • Impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery
  • Equipped with Star Protection Computer Controls to protect against overloading, over-discharging and over-heating
  • (2) 18V 5.0 Ah LXT Lithium-Ion Battery - BL1850B-2
Compliance and Restrictions
warning: Cancer and Birth Defect/Reproductive Harm --


Batteries Included: 2
Battery Amp Hours: 5.0 Ah
Battery Style: Slide
Battery Type: Li-Ion
Quantity: 2
Recharge Time: 45 mins.
Voltage: 18V



4.8 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (6)
Powerful (5)
Easy To Use (2)
Battery Longevity (if applicable) (2)
Best Uses
Frequent Use (2)
Large Projects (2)
Heavy Duty Requirements (1)
Small Projects (1)
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Frequent Use
Powerful batteries
Great power that last! Love charge lights to let me know there’s still enough charge to finish.
May 16, 2018
4 months ago
Describe Yourself:
Beginner- Casual Do-it-Yourselfer
Yes, I would recommend this to a friend
Battery Longevity (if applicable)
Best Uses
Large Projects
The batteries last a long time in drills and smaller tools, but not for larger tools.
May 7, 2018
5 months ago
Describe Yourself:
Yes, I would recommend this to a friend
Easy To Use
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
Great Batteries
These batteries are awesome and last a very longtime. They also charge super quickly (45 minutes for two 5 amp hour batteries.)
April 5, 2018
6 months ago
Yes, I would recommend this to a friend
Best Battery Ever
This new Makita battery works forever. When I put it on and used it my first thought was the old energizer bunny commercial, it just keeps going and going and going..... Some jobs I did in half the time bc I wouldn't have to change out batteries and wait for them to recharge. For the price of two smaller batteries I got this two battery pack and it lasts me 4x as much. Really good investment for anyone with Makita power tools.
June 27, 2016
Yes, I would recommend this to a friend
General construction use -
Much worth the extra money for the 5amp. Also pleased with the led battery indicator. Must have for the makita tools.
April 16, 2016
Yes, I would recommend this to a friend
Awesome website.
Great price and fast shipping.
March 21, 2016

Questions & Answers

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Browse 3 questions Browse 3 questions and 8 answers
Will these batteries work on all 18 volt Makita tools ?
Jules O on Dec 18, 2017
Are these batteries compatible with this Makita XSH03Z 18V LXT Cordless Lithium-Ion 6-1/2 in. Brushless Circular Saw (Bare Tool)
None on Jun 7, 2016
BEST ANSWER: Yes it should work.
I own the Makita XSH01Z 18-Volt X2 LXT Lithium-Ion Cordless 7-1/4-Inch Circular Saw
And it works fine
Which charger will balance charge the cells in the BL1850B-2?
Greg on Nov 14, 2015
BEST ANSWER: The Makita DC18RD 18V Lithium-Ion Dual Port Rapid Optimum Charger.


Warranty Information

Makita LXT Lithium-ion Tool Warranty

Every Makita® Lithium‐Ion Power Tool is thoroughly inspected and tested before leaving the factory. If you are not satisfied with any Makita Lithium‐Ion tool within 30 days of purchase, return it and Makita will provide, at Makita's option, a replacement or refund. Each Makita Lithium‐Ion Power Tool, Battery and Charger is warranted to be free of defects from workmanship and materials for the period of THREE YEARS from the date of original purchase. Should any trouble develop during the three‐year period for the Lithium‐Ion Power Tool, Battery and/or Charger, return the COMPLETE Power Tool, Battery and/or Charger, freight prepaid, to one of Makita's Factory or Authorized Service Centers.

If inspection shows the trouble is caused by defective workmanship or material, Makita will repair (or at our option, replace) without charge. This warranty does not apply to Makita Accessories, like flashlights.

This Warranty does not apply where:

  • Repairs have been made or attempted by others
  • Repairs are required because of normal wear and tear
  • The tool has been abused, misused or improperly maintained
  • Alterations have been made to the tool

  • In no event shall Makita be liable for any indirect, incidental or consequential damages from the sale or use of the product. This disclaimer applies to both during and after the term of this warranty. Makita disclaims liability for any implied warranties, including implied warranties of "merchantability" and "fitness" for a specific purpose, after the three-year term of this warranty. This warranty gives you specific legal rights, and you many also have other rights which vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.