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Makita BL1840B 2 18V LXT Lithium Ion 4.0Ah Battery Twin Pack Review
Last updated - June 19, 2025
Pros
The integrated L.E.D. battery charge level indicator allows the user to monitor the battery charge easily.- The 18V LXT Lithium Ion 4.0Ah battery BL1840B provides up to 35 more run time per charge compared to BL1830.
- The 18V LXT Lithium Ion 4.0Ah battery BL1840B reaches full charge in 40 minutes or less.
Cons
Larger battery may last longer.
Tech specs
| product dimensions | 3 x 6.75 x 9.75 inches |
| color | Black |
| batteries | 2 Lithium Ion batteries required. included |
| item weight | 5 ounces |
| batteries included | Yes |
| voltage | 18 Volts |
| warranty description | 3-year limited warranty |
| item package quantity | 1 |
| battery capacity | 4 Amp Hours |
| size | 4.0Ah |
| customer reviews | 4.7 4.7 out of 5 stars 433 ratings 4.7 out of 5 stars |
| style | 2-Pack |
| battery cell type | Lithium Ion |
| batteries required | Yes |
Product Overview
I recently had the pleasure of trying out the Makita BL1840B 2 18V LXT Lithium Ion 4.0Ah Battery Twin Pack. As someone who uses power tools regularly, I was curious to see if the battery pack would provide enough power for my needs. After a few days of testing, Im happy to report that it has exceeded my expectations.
The Makita BL1840B 2 offers an impressive amount of power for its size and weight. The 4.0Ah battery provides up to 35 more run time than its predecessor, the BL1830 battery. It also features an integrated L.E.D. battery charge level indicator which allows the user to monitor how much charge is left in the battery and avoid running out unexpectedly. The battery is also compatible with 18V LXT tools, making it a great choice for anyone looking to upgrade their current power tool set up.
In addition, the Makita BL1840B 2 is extremely lightweight and compact, making it easy to transport and store in tight spaces such as tool boxes or work benches. This makes it perfect for anyone who needs to quickly move from one job site to another without having to worry about carrying heavy batteries around with them.
Overall, Im incredibly impressed with the Makita BL1840B 2 18V LXT Lithium Ion 4.0Ah Battery Twin Pack. It provides plenty of power for all my needs and is easy to transport due to its lightweight design. I would highly recommend this product to anyone looking for reliable and powerful batteries for their power tools at a reasonable price point.
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