18-Volt LXT Lithium-Ion High Capacity Battery Pack 4.0Ah with Fuel Gauge and Charger Starter Kit
- Protected against overloading, over-discharging and overheating
- Charger communicates with battery to optimize battery life
- Works with all Makita STAR Protection tools
- See More Details
Frequently Bought Together
Product Overview
World's Largest 18V Lithium-Ion System
With each cordless tool, you hold over 100 years of motor engineering and over 40 years of cordless innovation
One System. Endless Possibilities.
Use the same batteries and chargers with all 36V and 18V LXT tools
The LXT Advantage
4 key components make up the LXT® Advantage, providing you with the most advanced, durable and dependable 18V products
Maximum Performance. No Cords Needed.
Break free from the cord with two 18V LXT® batteries.
Premium Power and Run Time
LXT® is the one-battery solution for contractors that require a cordless tool system that helps them be more productive
Compact Design and Performance
LXT® Compact continues to refine the formula of faster-charging batteries, more power and speed, and a leading power-to-weight ratio
A New Class in Cordless
The most compact and lightweight go-anywhere 18V solution
Faster Charging
The Rapid Optimum Charger communicates with the battery’s built-in chip to optimize battery life
More Run Time
Battery delivers constant power and run time in extreme temperatures, even in winter
Longer Motor Life
Makita-built Brushless Motor eliminates carbon brushes, so the motor runs cooler and more efficiently
Efficient Power Management
Overload protection, Over-discharge protection and Overheat protection
Star Protection
Star Protection is communication technology that protects against overload, over-discharge and overheating
3-Year Limited Warranty
On every Makita Lithium-Ion Tool, Battery and Charger from the date of original purchase.
- California residents
- Includes: 18-Volt 4.0Ah LXT lithium-ion battery (BL1840B), 18-Volt lithium-ion rapid optimum charger (DC18RC)
- Integrated LED battery charge level indicator allows user to monitor battery charge
- Provides up to 35% more run time per charge compared to BL1830
- 18-Volt LXT lithium-ion 4.0Ah battery reaches a full charge in 40 minutes or less
- Battery delivers consistent power and run time in extreme temperatures, even in winter (-4 degrees F / -20 degrees C)
- Equipped with STAR protection computer controls to protect against overloading, over-discharging and overheating
- Impact-resistant outer case and shock-absorbing inner liner are engineered to protect the battery
- 16 contact terminals maintain a constant connection with 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 only with STAR Protection tools, indicated by the star symbol and/or yellow battery receiver under the tool
- Rapid Optimum Charger communicates with battery’s built-in chip throughout charging process to optimize battery life by actively controlling current, voltage and temperature
- Built-in fan circulates air through battery during charging process to cool battery for faster charge time
- 3-year limited warranty
- Shop all Makita products
- Click here for more information on Electronic Recycling Programs
Info & Guides
Product Overview
- Protected against overloading, over-discharging and overheating
- Charger communicates with battery to optimize battery life
- Works with all Makita STAR Protection tools
Key Features
World's Largest 18V Lithium-Ion System
With each cordless tool, you hold over 100 years of motor engineering and over 40 years of cordless innovation
One System. Endless Possibilities.
Use the same batteries and chargers with all 36V and 18V LXT tools
The LXT Advantage
4 key components make up the LXT® Advantage, providing you with the most advanced, durable and dependable 18V products
Maximum Performance. No Cords Needed.
Break free from the cord with two 18V LXT® batteries.
Premium Power and Run Time
LXT® is the one-battery solution for contractors that require a cordless tool system that helps them be more productive
Compact Design and Performance
LXT® Compact continues to refine the formula of faster-charging batteries, more power and speed, and a leading power-to-weight ratio
A New Class in Cordless
The most compact and lightweight go-anywhere 18V solution
Faster Charging
The Rapid Optimum Charger communicates with the battery’s built-in chip to optimize battery life
More Run Time
Battery delivers constant power and run time in extreme temperatures, even in winter
Longer Motor Life
Makita-built Brushless Motor eliminates carbon brushes, so the motor runs cooler and more efficiently
Efficient Power Management
Overload protection, Over-discharge protection and Overheat protection
Star Protection
Star Protection is communication technology that protects against overload, over-discharge and overheating
3-Year Limited Warranty
On every Makita Lithium-Ion Tool, Battery and Charger from the date of original purchase.
Specifications
Details
Questions & Answers
Will this work With a 18-Volt LXT Lithium-Ion Cordless Bluetooth Job Site Radio?
Asked by Anonymous July 5, 2020As long as it is the slide-in type of battery, then yes.
I just purchased the cordless Makita xrf02z screwdriver! I need the battery and charger for it
Asked by Dan September 13, 2019Your owners manual will tell you what you need for the tool.
Will this battery work with my Makita xago4z 18v LXT angle grinder
Asked by Guillermo March 20, 2019Any LXT battery will work with any LXT tool of the same voltage. IE 12v to 12v & 18v to 18v.
Will this charger charge a BL1815N battery?
Asked by Tabby August 17, 2020Thank you for your question. Yes, the charger in the BL1840BD1 18V LXT® Lithium-Ion Battery and Charger Starter Pack (4.0Ah) will charge all Makita 18V LXT® Lithium-Ion Batteries including the BL1815N.
Can the DC 18 RC charger be directly connected to a 240 volt power supply ?
Asked by Rod June 9, 2016Your best bet is to go on the Makita website - there should be a list of which battery works with which charger and the voltage requirements of each charger.
Will battery/charger setup work with my Makita BMR100 portable radio?
Asked by Dave July 30, 2016If it's the same slide mount on the battery, and the same voltage, yes.
Is this battery good for all Makita Circular Saw? Or just for specific model?
Asked by turkey November 26, 2020Thank you for your question. All current versions of our battery operated circular saws will accept this battery.
Does the battery work for the Makita radio(XRM04B)?
Asked by aara310 June 25, 2017Yea
Will this battery work with the Makita 18-Volt LXT Lithium-Ion Cordless Variable Speed Lightweigh...
Asked by Justin June 21, 2019Yes, the higher amp-hour batteries (i.e. 4 and 5) will typically work in all the 18 volt LXT tools.
Can I trip on plane with this battery??
Asked by seba November 23, 2016It has been a few years since I have flown with mine. Check with TSA website to see. Just be sure to have the batteries un-installed in the tools before packing. If not, TSA will come get you and you will do it at a secured area for them.
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