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Model#: MKTNBL1840-2
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Makita BL1840-2 18V LXT 4.0 Ah Lithium-Ion Battery 2-Pack

  • Makita BL1840-2 18V LXT 4.0 Ah Lithium-Ion Battery 2-Pack
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$239.99
Sale Price:
$169.99
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Details

Makita continues being the innovation leader in cordless tool technology, expanding the world’s largest 18V Lithium-Ion cordless tool platform with the BL1840 18V LXT Lithium-Ion 4.0 Ah Battery Pack. The new battery is engineered for more run-time and faster charging than other 18V 4.0 Ah Lithium-Ion batteries on the market today. You can now depend on 35% more running time, and a full recharge of only 40 minutes, which is twice a faster rate than the competition. An impact-resistant outer case and shock-absorbing inner-liner will survive the demands of a harsh work environment, delivering power in the most extreme hot and cold weathers. STAR Protection Computer Controls allow the tool and battery to monitor conditions during use and exchange data in real time to protect against overloading, over-discharging and overheating, and will communicate with the Rapid Optimum Charger to optimize battery life by actively controlling current, voltage and temperature. With over 80 items in the lineup, Makita has again extended its line of 18V Lithium-Ion tools to give you unmatched breadth-of-line, power and efficiency.
Features:
  • Reaches a full charge in only 40 minutes which is two-times faster than leading competitors in its class
  • Fully compatible with 18V LXT and 18V Compact cordless tools that carry the star symbol
  • Up to 35% more run time than the Makita 18V LXT Lithium-Ion 3.0 Ah battery
  • Impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery
  • Battery delivers consistent power and run time in extreme temperatures, even in winter
  • STAR Protection Computer Controls allow the tool and battery to monitor conditions during use and exchange data in real time to protect against overloading, over-discharging and overheating
  • Communication with the Makita Rapid Optimum Charger (sold separately) takes place with the battery’s built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature
Includes:
  • (2) 18V LXT 4.0 Ah Lithium-Ion Battery Pack - BL1840

Specifications

Series: LXT
Battery Amp Hours: 4.0 Ah
Battery Style: 40 min.
Battery Type: Li-Ion
Recharge Time: 2
Voltage: 18V

Recommendations

Reviews

4.8 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
10
0
1
0
0
Recommendations
Yes, I would recommend this to a friend (11)
Pros
Powerful (9)
Battery Longevity (if applicable) (4)
Value (3)
Easy To Use (2)
Best Uses
Frequent Use (3)
Heavy Duty Requirements (2)
Small Projects (2)
Home Repair (2)
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Powerful
Value
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
typical makita product, always ready, always high performance.
batteries charged up in about 20 minutes and put the right to use.
October 2, 2016
Purchased
2 months ago
Describe Yourself:
Professional
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
It's Makita brand.
I bought cheep non-Makita-brand replacement batteries.
But those would not last one month.
Makita brand are expensive but reliable.
July 5, 2015
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
Extra Power is Great!
I use these 4.0 Ah batteries in all my high draw tools. Cicular Saw, Sander, Planer, 1/2" Impact Gun, etc. They really add the extra torque when you need it. I'll be replacing all my 3.0Ah batteries with these as the 3.0's wear out.
August 3, 2015
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
Great product and a great price
Great addition for my cordless hedge trimmer.
August 11, 2015
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
excellent value
extends the life of my drivers making projects so much eaiser and efficent . Great buy for the price
January 5, 2016
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
They last a long time
I have used the 3 amp hr batteries for many years. I hav a couple that are 11 years old and are still working although they have lost some capacity. These new 4amp hour batteries look to be even better although I have only used them for a couple of weeks now.
August 27, 2016
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Ergonomic Design
Powerful
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
Powerful Batteries
Batteries provide ample power for the many compatible Makita tools.
October 4, 2016
Purchased
2 months ago
Describe Yourself:
Avid Do-it-Yourselfer
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
Value
Battery Longevity (if applicable)
Best Uses
Frequent Use
Small Projects
Home Repair
Jobsite
Free batteries...
Nice..especially when free with purchase of 2 bare tools.
May do it again.....looking
October 14, 2016
Purchased
2 months ago
Describe Yourself:
Avid Do-it-Yourselfer
Recommendations
Yes, I would recommend this to a friend
Pros
Value
Battery Longevity (if applicable)
As to be expected. Quality item from Makita. Happy with purchase.
October 1, 2016
Purchased
2 months ago
Describe Yourself:
Beginner- Casual Do-it-Yourselfer
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
TWIN PACK 18v LXT BATTS
I have a large assortment of Makita LXT tools, but mostly the 3.0 batts. These are worth the price for the extended run time
February 9, 2016

Questions & Answers

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Browse 3 questions Browse 3 questions and 4 answers
The answer to another question, is unclear to me. Are these batteried compatable with the DC18RA charger? Don't tell me about the replacement charger DC18RC, this only confuses the matter.
Steve on Sep 29, 2015
BEST ANSWER: Yes, this battery is compatible with DC18RA model charger.
can this BL1840 be charged on Makita DC 18SC charger
Mack on Apr 9, 2015
BEST ANSWER: Yes,the DC18SC will charge the 4.0 ah lithium ion battery.
can this BL1840 battery be charged on the makita DC18RA charger
J on Jan 21, 2015
BEST ANSWER: The DC18RA has been discontinued and replaced by Makita DC18RC.Yes the BL1840 can be charged with this charger.

Warranty

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.