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Makita 18V 4.0Ah Li-Ion LXT Battery BL1840B 196399-0 BL1840 Star Genuine UK
Stock Code:
BL1840
Makita 18V 4.0Ah Li-Ion LXT Battery BL1840B 196399-0 BL1840 Star Genuine UK
Stock Code:
BL1840
View All: Cordless Batteries, Chargers
View All Makita Products
View All: Makita Sale
£54.99
Excl. VAT
£45.82
Excl. VAT
In stock - FREE STANDARD DELIVERY to most UK postcodes - Next Day Delivery Available
Description
Specification
Warranty
Delivery
Returns
Finance Options
Reviews
Features include:
Unbeatable 36 minute charge time.
Up to 33% extra runtime and extended battery life.
Same size and weight as 3.0Ah BL1830.
Works with your current Li-ion chargers.
Computer controlled optimum charging.
Compatible with starred terminal machines.
Compatible with yellow terminal machines.
Cooling System for max battery life.
Battery protection circuit.
LXT Lithium-Ion battery and optimum charging system produces 280 percent total lifetime work with 2x more cycles. 5x Lower self-discharge keeps battery cells active and ready for use, even after long periods of storage.
Charging at any time will have no effect on the battery. Built-in shock absorbing features protect the battery. Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation in high vibration work environments.
Battery's built-in Memory Chip communicates with the charger to maximize battery life using 3 Active Controls (Current, Voltage & Thermal). Battery suitable for all Makita li-ion LXT 18 volt machines.
Star Protected Makita Battery
The demanding applications you take on every day are also demanding on your cordless tools and batteries. You rely on your tools, so Makita created STAR Protection Computer Controls . STAR Protection is communication technology that allows the tool and battery to monitor conditions and exchange data in real time to protect against Overloading, Over-Discharging and Over-heating. Look for Makita tools and batteries with the STAR and get these protection features.
Makita Star Battery - Overload Protection
High-drain applications require maximum battery power. Makita tools and batteries are engineered for industrial applications, but sustained peak demand can overload the tool. Makita s STAR Protection Computer Controls allow the battery and tool to communicate and protect your tool and battery from overload by cutting power when put under abnormally high current draw.
Makita Star Battery - Overcharge Discharge Protection
Lithium-ion batteries are engineered for longer, sustained performance. But running a battery until it s dead empty can damage the cells. Makita STAR Protection Computer Controls monitor battery charge capacity, and if the battery is too low to complete the application it will cut power in order to extend battery life.
Makita Star Battery - Over heat protection
Extreme heat is the enemy of ALL batteries. It can make batteries charge slower, damage battery cells, and reduce battery life. Makita STAR Protection Computer Controls monitor battery heat during operation. If the battery reaches a certain level of heat it will cut power to the tool.
Will the Makita 4ah Battery Work With My Makita Tool
LOOK FOR THE STAR - The 18v 4.0ah battery BL1840 will work with your 18v machine if it has a star on the connector plate, has a yellow connector plate with a star or has a yellow connector plate only.
Why Choose the Makita BL1840 4.0ah Lithium Ion Battery
36 Minute Charge Time
The Makita 18v 4.0Ah Li-ion batteries charge with existing DC18RA and DC18RC chargers with an unbeatable 36 minute charge time.
Through this two way communication between charger and battery, the charger can recognise the battery and recall its charging history analyse the batteries condition and usage and charge the battery accordingly.
Same Weight More Power
The weight saving means that Makita can have 4.0Ah from a battery weighing the same as the existing BL1830 3.0Ah lithium ion battery.
Not only is it the same weight but also you will have much more power and a longer lasting battery life.
Unbeatable 36 minute charge time.
Up to 33% extra runtime and extended battery life.
Same size and weight as 3.0Ah BL1830.
Works with your current Li-ion chargers.
Computer controlled optimum charging.
Compatible with starred terminal machines.
Compatible with yellow terminal machines.
Cooling System for max battery life.
Battery protection circuit.
LXT Lithium-Ion battery and optimum charging system produces 280 percent total lifetime work with 2x more cycles. 5x Lower self-discharge keeps battery cells active and ready for use, even after long periods of storage.
Charging at any time will have no effect on the battery. Built-in shock absorbing features protect the battery. Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation in high vibration work environments.
Battery's built-in Memory Chip communicates with the charger to maximize battery life using 3 Active Controls (Current, Voltage & Thermal). Battery suitable for all Makita li-ion LXT 18 volt machines.
Star Protected Makita Battery
The demanding applications you take on every day are also demanding on your cordless tools and batteries. You rely on your tools, so Makita created STAR Protection Computer Controls . STAR Protection is communication technology that allows the tool and battery to monitor conditions and exchange data in real time to protect against Overloading, Over-Discharging and Over-heating. Look for Makita tools and batteries with the STAR and get these protection features.
Makita Star Battery - Overload Protection
High-drain applications require maximum battery power. Makita tools and batteries are engineered for industrial applications, but sustained peak demand can overload the tool. Makita s STAR Protection Computer Controls allow the battery and tool to communicate and protect your tool and battery from overload by cutting power when put under abnormally high current draw.
Makita Star Battery - Overcharge Discharge Protection
Lithium-ion batteries are engineered for longer, sustained performance. But running a battery until it s dead empty can damage the cells. Makita STAR Protection Computer Controls monitor battery charge capacity, and if the battery is too low to complete the application it will cut power in order to extend battery life.
Makita Star Battery - Over heat protection
Extreme heat is the enemy of ALL batteries. It can make batteries charge slower, damage battery cells, and reduce battery life. Makita STAR Protection Computer Controls monitor battery heat during operation. If the battery reaches a certain level of heat it will cut power to the tool.
Will the Makita 4ah Battery Work With My Makita Tool
LOOK FOR THE STAR - The 18v 4.0ah battery BL1840 will work with your 18v machine if it has a star on the connector plate, has a yellow connector plate with a star or has a yellow connector plate only.
Why Choose the Makita BL1840 4.0ah Lithium Ion Battery
36 Minute Charge Time
The Makita 18v 4.0Ah Li-ion batteries charge with existing DC18RA and DC18RC chargers with an unbeatable 36 minute charge time.
Through this two way communication between charger and battery, the charger can recognise the battery and recall its charging history analyse the batteries condition and usage and charge the battery accordingly.
Same Weight More Power
The weight saving means that Makita can have 4.0Ah from a battery weighing the same as the existing BL1830 3.0Ah lithium ion battery.
Not only is it the same weight but also you will have much more power and a longer lasting battery life.
Specification of the Makita BL1840
Type: Li-ion Voltage: 18V
Capacity: 4.0Ah
Energy rating: 72Wh
Number of cells: 10
Charging time (DC18RC): 36 minutes
Individual cell monitoring: Yes
Battery protection circuit: Yes
Weight: 640g
Type: Li-ion Voltage: 18V
Capacity: 4.0Ah
Energy rating: 72Wh
Number of cells: 10
Charging time (DC18RC): 36 minutes
Individual cell monitoring: Yes
Battery protection circuit: Yes
Weight: 640g
EAN: 0088381426749
Makita has built a reputation for outstanding Service Care, which supports regular repair and part replacement. Makita will fix and service any Makita Powertool or accessory, even those models that may now be discontinued or obsolete.
Makita 3 Year Warranty
The 3 year warranty applies to tools purchased on or after July 1st 2012. This excludes batteries, chargers, outdoor power equipment, pneumatic/airtools, petrol driven tools, gas nailers, clothes and accessories. These are all supplied with a standard years warranty.
Tools must be registed online on Makita UK Warranty Registration Page within 30 days of purchase to qualify for the warranty extension otherwise a standard 1 year warranty will apply.
Any warranty claims outside of the 1st year but within the second or 3rd must be dealt with directly by Makita.
These extended warranties cover free of charge repairs due to defects in workmanship or materials from original date of purchase, as per Makita terms and conditions.
Registration is required for extended warranty at no cost.
Proof of purchase is mandatory for ALL extended warranty claims submitted.
For Further details on the 3 year warranty plan see Makitas 3 Year Warranty Terms and Conditions.
As of 1st April 2025, Makita batteries and chargers are now covered by a 2 year warranty - registration not required.
What if my product becomes faulty?
Any warranty claim must be logged within the warranty period. This involves sending the tool complete packaged to a local dealer or Authorised Service agent with the 3 year certificate and the original sales receipt.
Alternatively you can send it to Makita UK Ltd in Milton Keynes. To arrange this please contact Makita UK on Tel: 01908 211 678, or email: [email protected].
Subject to inspection, the product will be repaired free of charge. Costs may be incurred for any warranty claims that are deemed invalid.
Buyaparcel offer delivery throughout the United Kingdom, including Northern Ireland, Scottish Highlands and other Islands of the UK. We do not currently ship overseas.
UK Delivery Prices
Standard delivery is free with no minimum order charge to most mainland UK delivery addresses. Surcharges can apply to certain postcodes depending on the service type. For full details visit our Delivery Guide.
In additional to our standard service we also offer some premium delivery services if you need your item quickly
£0.00 - Standard UK Delivery (2-3 Days Approx)
£2.99 - Next Day UK Delivery (Orders placed before 3.00pm Monday - Friday)
*orders placed after 3.00pm Friday will still be delivered Monday if ordered before 11am Saturday Morning
£8.99 - Saturday Delivery (Orders placed before 3.00pm Friday)
£36.00 - Pallet Delivery (2-3 Days Approx - selected products only)
Alternatively if you view your parcel once items have been added and enter your postcode you will see what derlivery services are available.
Is My Item Available for Next Day Delivery?
If your item is stocked in our immediate picking location it will available for you to choose a next day delivery. This will be highlighted by a green tick and a 1 day dispatch time on the item information. 
You will have the option to choose this service if you are purchasing your item for delivery to mainland UK.
What courier will my item be delivered with?
If your item is being delivered in the UK or Ireland, it will be delivered by DHL eCopmmerce UK, Evri or Royal Mail, with the exception of pallet items.
Details of each courier service we offer are detailed in our Delivery Guide.
Is My Item Available for Click and Collect at your Lowestoft Store?
If your item is showing "In Stock" then you will be able to do a Same Day Click and Collect order from our Lowestoft Pinbush Road. Our cut off for same day collections is 3.00pm Mon-Fri / 11.00am Saturday. After that the product will be ready the next day for collection. After the cut off you are welcome to do a Call and Collect order by phoning our trade counter on 01502 507666. If your item is in stock you will still be able to do a same day collection and payment.
Our store is open Monday to Friday 8.00am - 5.00pm and Saturday 8.00am - 12.00pm so any orders placed the remainder of the weekend will be available for collection on Monday. Weekdays any orders placed up to midnight will be available for collection the following day. This excludes bank holidays.
Please wait for email confirmation your order is ready for collection from our store before you travel.
On collection we will require you to show a copy of your order confirmation, electronic or printed. In addition to this please bring photo ID which must be your passport or photo driving licence, matching the name on the PayPal/Amazon/Credit or Debit card used.
Collection option only available to NR and IP Postcodes
We've simplified our returns process! We now offer a no-questions-asked, free returns service within the first 30 days (subject to T&Cs).
You can find our returns information in our Terms and Help page
Spread the cost of your Buyaparcel purchase with Paypal Credit - Get 0% finance over 4 months! The perfect way to spread the cost of any purchases of £99 (inc vat) or more
Applying is that simple. If approved and you accept, you'll have a credit limit added to your PayPal account ready to use immediately. Plus, you'll automatically get 0% interest for 4 months on all your purchases of £99 or more.*
How to apply for Paypal Credit with Buyaparcel?
You have 2 ways to purchase from us with the option us using Paypal Credit.
1 - From the product page you can use Paypal Express Checkout which will take you straight to your Paypal account where you can login to complete payment or apply for Paypal Credit.
2 - If you add your product to your parcel and click "Proceed to Checkout" you will then go to our payment page. Select "Paypal Express Checkout" from the payment methods available and click "Place Order".
Once you are in your Paypal account choose PayPal Credit from the payment options.
If this is the first time you have used PayPal Credit, you will be asked to complete a short application form to apply for PayPal credit.
More Information on Paypal Credit
Write Your Own Review
Description
Features include:
Unbeatable 36 minute charge time.
Up to 33% extra runtime and extended battery life.
Same size and weight as 3.0Ah BL1830.
Works with your current Li-ion chargers.
Computer controlled optimum charging.
Compatible with starred terminal machines.
Compatible with yellow terminal machines.
Cooling System for max battery life.
Battery protection circuit.
LXT Lithium-Ion battery and optimum charging system produces 280 percent total lifetime work with 2x more cycles. 5x Lower self-discharge keeps battery cells active and ready for use, even after long periods of storage.
Charging at any time will have no effect on the battery. Built-in shock absorbing features protect the battery. Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation in high vibration work environments.
Battery's built-in Memory Chip communicates with the charger to maximize battery life using 3 Active Controls (Current, Voltage & Thermal). Battery suitable for all Makita li-ion LXT 18 volt machines.
Star Protected Makita Battery
The demanding applications you take on every day are also demanding on your cordless tools and batteries. You rely on your tools, so Makita created STAR Protection Computer Controls . STAR Protection is communication technology that allows the tool and battery to monitor conditions and exchange data in real time to protect against Overloading, Over-Discharging and Over-heating. Look for Makita tools and batteries with the STAR and get these protection features.
Makita Star Battery - Overload Protection
High-drain applications require maximum battery power. Makita tools and batteries are engineered for industrial applications, but sustained peak demand can overload the tool. Makita s STAR Protection Computer Controls allow the battery and tool to communicate and protect your tool and battery from overload by cutting power when put under abnormally high current draw.
Makita Star Battery - Overcharge Discharge Protection
Lithium-ion batteries are engineered for longer, sustained performance. But running a battery until it s dead empty can damage the cells. Makita STAR Protection Computer Controls monitor battery charge capacity, and if the battery is too low to complete the application it will cut power in order to extend battery life.
Makita Star Battery - Over heat protection
Extreme heat is the enemy of ALL batteries. It can make batteries charge slower, damage battery cells, and reduce battery life. Makita STAR Protection Computer Controls monitor battery heat during operation. If the battery reaches a certain level of heat it will cut power to the tool.
Will the Makita 4ah Battery Work With My Makita Tool
LOOK FOR THE STAR - The 18v 4.0ah battery BL1840 will work with your 18v machine if it has a star on the connector plate, has a yellow connector plate with a star or has a yellow connector plate only.
Why Choose the Makita BL1840 4.0ah Lithium Ion Battery
36 Minute Charge Time
The Makita 18v 4.0Ah Li-ion batteries charge with existing DC18RA and DC18RC chargers with an unbeatable 36 minute charge time.
Through this two way communication between charger and battery, the charger can recognise the battery and recall its charging history analyse the batteries condition and usage and charge the battery accordingly.
Same Weight More Power
The weight saving means that Makita can have 4.0Ah from a battery weighing the same as the existing BL1830 3.0Ah lithium ion battery.
Not only is it the same weight but also you will have much more power and a longer lasting battery life.
Unbeatable 36 minute charge time.
Up to 33% extra runtime and extended battery life.
Same size and weight as 3.0Ah BL1830.
Works with your current Li-ion chargers.
Computer controlled optimum charging.
Compatible with starred terminal machines.
Compatible with yellow terminal machines.
Cooling System for max battery life.
Battery protection circuit.
LXT Lithium-Ion battery and optimum charging system produces 280 percent total lifetime work with 2x more cycles. 5x Lower self-discharge keeps battery cells active and ready for use, even after long periods of storage.
Charging at any time will have no effect on the battery. Built-in shock absorbing features protect the battery. Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation in high vibration work environments.
Battery's built-in Memory Chip communicates with the charger to maximize battery life using 3 Active Controls (Current, Voltage & Thermal). Battery suitable for all Makita li-ion LXT 18 volt machines.
Star Protected Makita Battery
The demanding applications you take on every day are also demanding on your cordless tools and batteries. You rely on your tools, so Makita created STAR Protection Computer Controls . STAR Protection is communication technology that allows the tool and battery to monitor conditions and exchange data in real time to protect against Overloading, Over-Discharging and Over-heating. Look for Makita tools and batteries with the STAR and get these protection features.
Makita Star Battery - Overload Protection
High-drain applications require maximum battery power. Makita tools and batteries are engineered for industrial applications, but sustained peak demand can overload the tool. Makita s STAR Protection Computer Controls allow the battery and tool to communicate and protect your tool and battery from overload by cutting power when put under abnormally high current draw.
Makita Star Battery - Overcharge Discharge Protection
Lithium-ion batteries are engineered for longer, sustained performance. But running a battery until it s dead empty can damage the cells. Makita STAR Protection Computer Controls monitor battery charge capacity, and if the battery is too low to complete the application it will cut power in order to extend battery life.
Makita Star Battery - Over heat protection
Extreme heat is the enemy of ALL batteries. It can make batteries charge slower, damage battery cells, and reduce battery life. Makita STAR Protection Computer Controls monitor battery heat during operation. If the battery reaches a certain level of heat it will cut power to the tool.
Will the Makita 4ah Battery Work With My Makita Tool
LOOK FOR THE STAR - The 18v 4.0ah battery BL1840 will work with your 18v machine if it has a star on the connector plate, has a yellow connector plate with a star or has a yellow connector plate only.
Why Choose the Makita BL1840 4.0ah Lithium Ion Battery
36 Minute Charge Time
The Makita 18v 4.0Ah Li-ion batteries charge with existing DC18RA and DC18RC chargers with an unbeatable 36 minute charge time.
Through this two way communication between charger and battery, the charger can recognise the battery and recall its charging history analyse the batteries condition and usage and charge the battery accordingly.
Same Weight More Power
The weight saving means that Makita can have 4.0Ah from a battery weighing the same as the existing BL1830 3.0Ah lithium ion battery.
Not only is it the same weight but also you will have much more power and a longer lasting battery life.
Specification
Specification of the Makita BL1840
Type: Li-ion Voltage: 18V
Capacity: 4.0Ah
Energy rating: 72Wh
Number of cells: 10
Charging time (DC18RC): 36 minutes
Individual cell monitoring: Yes
Battery protection circuit: Yes
Weight: 640g
Type: Li-ion Voltage: 18V
Capacity: 4.0Ah
Energy rating: 72Wh
Number of cells: 10
Charging time (DC18RC): 36 minutes
Individual cell monitoring: Yes
Battery protection circuit: Yes
Weight: 640g
EAN: 0088381426749
Warranty
Makita has built a reputation for outstanding Service Care, which supports regular repair and part replacement. Makita will fix and service any Makita Powertool or accessory, even those models that may now be discontinued or obsolete.
Makita 3 Year Warranty
The 3 year warranty applies to tools purchased on or after July 1st 2012. This excludes batteries, chargers, outdoor power equipment, pneumatic/airtools, petrol driven tools, gas nailers, clothes and accessories. These are all supplied with a standard years warranty.
Tools must be registed online on Makita UK Warranty Registration Page within 30 days of purchase to qualify for the warranty extension otherwise a standard 1 year warranty will apply.
Any warranty claims outside of the 1st year but within the second or 3rd must be dealt with directly by Makita.
These extended warranties cover free of charge repairs due to defects in workmanship or materials from original date of purchase, as per Makita terms and conditions.
Registration is required for extended warranty at no cost.
Proof of purchase is mandatory for ALL extended warranty claims submitted.
For Further details on the 3 year warranty plan see Makitas 3 Year Warranty Terms and Conditions.
As of 1st April 2025, Makita batteries and chargers are now covered by a 2 year warranty - registration not required.
What if my product becomes faulty?
Any warranty claim must be logged within the warranty period. This involves sending the tool complete packaged to a local dealer or Authorised Service agent with the 3 year certificate and the original sales receipt.
Alternatively you can send it to Makita UK Ltd in Milton Keynes. To arrange this please contact Makita UK on Tel: 01908 211 678, or email: [email protected].
Subject to inspection, the product will be repaired free of charge. Costs may be incurred for any warranty claims that are deemed invalid.
Returns
We've simplified our returns process! We now offer a no-questions-asked, free returns service within the first 30 days (subject to T&Cs).
You can find our returns information in our Terms and Help page
Finance Options
Spread the cost of your Buyaparcel purchase with Paypal Credit - Get 0% finance over 4 months! The perfect way to spread the cost of any purchases of £99 (inc vat) or more
Applying is that simple. If approved and you accept, you'll have a credit limit added to your PayPal account ready to use immediately. Plus, you'll automatically get 0% interest for 4 months on all your purchases of £99 or more.*
How to apply for Paypal Credit with Buyaparcel?
You have 2 ways to purchase from us with the option us using Paypal Credit.
1 - From the product page you can use Paypal Express Checkout which will take you straight to your Paypal account where you can login to complete payment or apply for Paypal Credit.
2 - If you add your product to your parcel and click "Proceed to Checkout" you will then go to our payment page. Select "Paypal Express Checkout" from the payment methods available and click "Place Order".
Once you are in your Paypal account choose PayPal Credit from the payment options.
If this is the first time you have used PayPal Credit, you will be asked to complete a short application form to apply for PayPal credit.
More Information on Paypal Credit
Reviews
Write Your Own Review
