Model # BL1840-2

Internet #205579204

Store SO SKU #1001020072

Makita 18-Volt LXT 4.0Ah Lithium-Ion Battery (2-Pack)
0088381430180

Makita

18-Volt LXT 4.0Ah Lithium-Ion Battery (2-Pack)

  • Up to 35% more run time compared to the 18-Volt 3.0Ah battery
  • Charges in 40 minutes or less with Makita Rapid Optimum Charger
  • Compatible only with Star Protection tools
$17944 /each

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Product Overview

  • Up to 35% more run time compared to the 18-Volt 3.0Ah battery
  • Charges in 40 minutes or less with Makita Rapid Optimum Charger
  • Compatible only with Star Protection tools
The Makita 18-Volt 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 4.0Ah 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. Makita 18-Volt 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 18-Volt lithium-ion slide-style battery.
  • Provides up to 35% more run time per charge compared to the 18-Volt 3.0Ah battery (BL1830)
  • Reaches a full charge in 40 minutes or less on the Makita rapid optimum charger (sold separately)
  • Battery delivers consistent power and run time in extreme temperatures, even in winter (-4°F/-20°C)
  • 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
  • Makita rapid optimum charger (sold separately) communicates with the battery’s built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature
  • Impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery
  • 16 contact terminals maintain a constant connection with the tool to help prevent power loss or fluctuation, even during high-vibration applications
  • Battery resists self-discharge and remains ready for use even after long periods of storage
  • Compatible with Makita 18-Volt LXT and 18-Volt compact cordless tools with the star symbol
  • Makita 18-Volt lithium-ion is the world’s largest cordless tool line-up powered by an 18-Volt lithium-ion slide-style battery
  • 3-year limited warranty



  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Up to 35% more run time compared to the 18-Volt 3.0Ah battery
  • Charges in 40 minutes or less with Makita Rapid Optimum Charger
  • Compatible only with Star Protection tools
Model #: BL1840-2
Internet #: 205579204

The Makita 18-Volt 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 4.0Ah 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. Makita 18-Volt 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 18-Volt lithium-ion slide-style battery.

California residents: see   Proposition 65 information

  • Provides up to 35% more run time per charge compared to the 18-Volt 3.0Ah battery (BL1830)
  • Reaches a full charge in 40 minutes or less on the Makita rapid optimum charger (sold separately)
  • Battery delivers consistent power and run time in extreme temperatures, even in winter (-4°F/-20°C)
  • 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
  • Makita rapid optimum charger (sold separately) communicates with the battery’s built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature
  • Impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery
  • 16 contact terminals maintain a constant connection with the tool to help prevent power loss or fluctuation, even during high-vibration applications
  • Battery resists self-discharge and remains ready for use even after long periods of storage
  • Compatible with Makita 18-Volt LXT and 18-Volt compact cordless tools with the star symbol
  • Makita 18-Volt lithium-ion is the world’s largest cordless tool line-up powered by an 18-Volt lithium-ion slide-style battery
  • 3-year limited warranty



  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
6.75 in
Product Height (in.)
3.25 in
Product Length (in.)
0
Product Width (in.)
9.75 in

Details

Battery Power Type
Lithium Ion
Color Family
Black
Number of Batteries Included
2
Power Tool Accessory Type
Battery
Power Tool Features
No Additional Features
Rechargeable
Yes
Returnable
90-Day
Tools Product Type
Power Tool
Voltage (volts)
18

Specifications

Dimensions

Product Depth (in.)
6.75 in
Product Height (in.)
3.25 in
Product Length (in.)
0
Product Width (in.)
9.75 in

Details

Battery Power Type
Lithium Ion
Color Family
Black
Number of Batteries Included
2
Power Tool Accessory Type
Battery
Power Tool Features
No Additional Features
Rechargeable
Yes
Returnable
90-Day
Tools Product Type
Power Tool
Voltage (volts)
18

Questions & Answers

Does Makita warrant these?

Do these batteries come with a factory warranty from Makita? Also, can I purchase an extended warranty from Home Depot?
Asked by: Gyrodork
Yes
Answered by: BobofZ
Date published: 2016-01-20

Which Makita drill-drivers (not hammer drill-drivers) are compatible with this Makita 18-Volt LXT Lithium-Ion 4.0Ah Battery?

Do you offer a combination Makita drill-driver and the BL-1840 4ah battery?
Asked by: Snurd
If your Makita 18 V LXT is not in the following list, then it is compatible. List Makita 18 V product that are NOT COMPATIBLE (37 products):- BDF452HW Drill / Driver BHP451 Drill / Driver BDF451 Drill / Driver BGA452 Angle Grinder BTP140 Hybrid Impact Hammer Driver Drill BTD140 Impact Driver BSS610 Circular Saw BVR850 Concrete Vibrator BHR240 Rotary Hammer BJR181 Reciprocating Saw BPB180 Portable Band Saw BVR450 Concrete Vibrator BTD142 18V Compact Lithium-Ion Cordless Impact Driver BTW251 18V LXT Lithium-Ion Cordless 1/2″ Impact Wrench BJV180 18V LXT Lithium-Ion Cordless Jig Saw BSS501 18V LXT Lithium-Ion Cordless 5-3/8″ Circular Trim Saw BCS550 18V LXT Lithium-Ion Cordless 5-3/8″ Metal Cutting Saw BHP452 18V LXT Lithium-Ion Cordless 1/2″ Hammer Drill-Driver BTD141 18V LXT Lithium-Ion Cordless Impact Driver BTL061 18V LXT Lithium-Ion Cordless Angle Impact Driver BTW450 18V LXT Lithium-Ion 1/2″ Cordless Impact Wrench BSS611 18V LXT Lithium-Ion 6-1/2″ Circular Saw BJR182 18V LXT Lithium-Ion Reciprocating Saw BTW253 18V LXT Lithium-Ion Cordless 3/8″ Impact Wrench BJS130 18V LXT Lithium-Ion Cordless 18 Gauge Straight Shear BDA350 18V LXT Lithium-Ion Cordless 3/8″ Angle Drill BFS450 18V LXT Lithium-Ion Cordless Drywall Screwdriver BHR202 18V LXT Lithium-Ion Cordless 7/8″ SDS-Plus Rotary Hammer BFR750 18V LXT Lithium-Ion Cordless Autofeed Screwdriver BHP454 18V LXT Lithium-Ion Cordless 1/2″ Hammer Driver-Drill BDF453 18V 1/2″ Cordless Driver Drill BTL063 18V LXT Lithium-Ion Cordless 3/8″ Angle Impact Wrench BCS550Z 18V LXT Lithium-Ion Cordless 5-3/8″ Metal Cutting Saw BGA452Z 18V LXT Lithium-Ion Cordless 4-1/2″ Cut-Off/Angle Grinder BHR202Z 18V LXT Lithium-Ion Cordless 7/8″ Rotary Hammer BHR240Z 18V LXT Lithium-Ion Cordless 7/8″ SDS-PLUS Rotary Hammer BDA350Z 18V LXT Lithium-Ion Cordless 3/8″ Angle Drill BDF451Z Cordless 1/2″ Driver-Drill BDF452 Cordless 1/2″ Driver-Drill BFR750Z Cordless Autofeed Screwdriver BFS450Z Cordless Drywall Screwdriver BJR181Z Cordless Recipro Saw BTW450Z 18V LXT Lithium-Ion Cordless 1/2″ High Torque Impact Wrench BVR450Z 18V LXT Lithium-Ion Cordless 4 Ft. Concrete Vibrator BVR850Z 18V LXT Lithium-Ion Cordless 8 Ft. Concrete Vibrator BJV180Z 18V LXT Lithium-Ion Cordless Jig Saw BPB180Z 18V LXT Lithium-Ion Cordless Portable Band Saw BSS610Z 18V LXT Lithium-Ion Cordless 6-1/2″ Circular Saw BSS611Z 18V LXT Lithium-Ion Cordless 6-1/2″ Circular Saw BTD141Z 18V LXT Lithium-Ion Cordless Impact Driver BHR241 Lithium-Ion Cordless Rotary Hammer BHR241Z Lithium-Ion Cordless Rotary Hammer LXDG01 18V LXT Lithium-Ion Cordless 1/4″ Die Grinder LXDG01Z 18V LXT Lithium-Ion Cordless 1/4″ Die Grinder LXNJ01Z 18V LXT Lithium-Ion Cordless 16 Gauge Nibbler Tool Only XDG01Z 8V LXT Lithium-Ion Cordless 1/4″ Die Grinder XWT01Z 18V LXT Lithium-Ion High-Torque Impact Wrench
Answered by: Yogesh
Date published: 2016-08-22

Are these batteries compatible with the DC18RC charger

Asked by: Erick
Yes, the Makita 18-Volt LXT 4.0Ah Lithium-Ion Battery (BL1840) is compatible with the 18-Volt Lithium-Ion Rapid Optimum Battery Charger (DC18RC).
Answered by: BrandAnswers
Date published: 2016-04-19

Is the 18-V LXT 4.0Ah battery compatible with DR18LA charger? How does it differ from the BL1815 battery?

Asked by: lc
This unit is compatible with the DR18LA charger and has nearly 3 times the storage capacity of the BL1815.
Answered by: CommunityAnswer
Date published: 2016-01-28
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Customer Reviews

18-Volt LXT 4.0Ah Lithium-Ion Battery (2-Pack) is rated 4.5 out of 5 by 13.
Rated 5 out of 5 by from WOW!! Beyond impressed I've been a big Makita user for nearly a decade, and have never had a complaint about the tools or the batteries (my guess is most who have either just ran nto a bad battery or something with how they're using or charging them causes their issues). But I had to try out the new 4.0 AH BL1840. Obviously, the easy benefit of these is that they're 1/3 bigger than the old 3.0 AH. SO I expected better runtime. I was beond impressed with the runtime. Yoiu'd expect a third more cuts or holes per charge. While I haven't conducted any real runtime comparisons, I'd guess the improvement is closer to 50% more work. Awesome! WHat I didn't expect is how much faster and more powerful my tools seem when using the 4.0 battery. Doing a basement remodel driling into cement block, I was blown away, even compared to the 3.0. Normally I grab my bigger hammer drill when I'm using the hammer mde. With the 4.0, my standard hammer drill (the one that comes in the kits) felt more powerful than normal, and well up to the task. It doesn't make sense the tool would be stronger just with a bigger batery, but I'm telling you it sure feels like it. I heard a lot of guys on jobs saying Makita missed the boat taking so much longer to get their 4.0 batteries on the market. My imression is they took the time to not just put out a bigger battery, but a better battery. It was well worth the wait. Plus the charge time is still just 40 minutes, half of the other guys!
Date published: 2015-04-22
Rated 3 out of 5 by from Replacement purchase The Mikita tools I have work perfect. It's the batteries I have a problem with. I find my self buying new batteries because they don't last when used every day. There are other brands that replace the batteries for free. That is something I will be looking into
Date published: 2015-06-23
Rated 5 out of 5 by from Batteries I was trying to buy 5amp batteries, however they were not available so I purchased the 4amp ones instead. All my past batteries were 3amp & I never had problems with them until I bought the brushless weed wacker & needed more run time to get around the yard. They get it done!!
Date published: 2016-01-19
Rated 5 out of 5 by from good quality The batteries hold charges for a very long time and easy to load
Date published: 2015-05-12
Rated 5 out of 5 by from works great! Some reviews online state these may not work with older 18v Makita tools. Thankfully they work in all 7 of mine! A significant difference in run time. If you're running these tools a lot, these batteries will pay for themselves in no time! There's rumor of a 5aH on the horizon.....
Date published: 2015-02-18
Rated 4 out of 5 by from Expensive but competitivly Priced The 4.0 ah battery is just right for the Makita 18V Vacuum ordered at the same time. The HDuty battery works well in this application. If I did not own a couple of 18V Makita Drills, I would not have purchased the 4.0ah and the necessary charger. An overall good fit for the task for which it was purchased. The Delivery was very good, and I put it to work the following day. No Regrets. CJ
Date published: 2015-03-24
Rated 5 out of 5 by from love my new batteries the new batteries last so much longer it increases work time and productivity and not to forget mental relaxation of having another one charged before the first one dies !!!
Date published: 2016-06-24
Rated 5 out of 5 by from Needed power Great power. Use for work. Prompt service. Home Depot has what I need.
Date published: 2016-09-06
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