

🔋 Power up smarter, work longer, and never miss a beat!
The Makita BL1840B-2 is a twin pack of 18V LXT Lithium-Ion 4.0Ah batteries engineered for professionals who demand fast charging and extended runtime. Featuring a 35% longer run time than previous models, a rapid 40-minute charge cycle, and an intuitive LED charge indicator, these batteries integrate STAR Protection technology to safeguard tool and battery health. Compatible exclusively with Makita’s Star Protection 18V LXT tools, this pack ensures peak performance and durability backed by a 3-year limited warranty.







| ASIN | B015PVD9OC |
| Batteries | 2 Lithium Ion batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Capacity | 4 Amp Hours |
| Battery Cell Type | Lithium Ion |
| Best Sellers Rank | #74,734 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #707 in Cordless Tool Battery Packs |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (482) |
| Date First Available | September 3, 2015 |
| Included Components | (2) 18V LXT® Lithium-Ion 4.0Ah Battery |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 5 ounces |
| Item model number | BL1840B-2 |
| Manufacturer | Makita |
| Part Number | BL1840 |
| Power Source | Corded Electric |
| Product Dimensions | 3 x 6.75 x 9.75 inches |
| Size | 4.0Ah |
| Style | 2-Pack |
| Voltage | 120 |
| Warranty Description | 3-year limited warranty |
C**L
Makita batteries seem more expensive than pretty much any other brand or device but I think ...
Makita batteries seem more expensive than pretty much any other brand or device but I think you get what you pay for. I have never had an issue with these or any Makita branded batteries. They charge very fast and last long enough to charge up the other one (depending on the device you are powering.) The 4.0Ah version is the same size and weighs as much as the 3.0Ah as far as I can tell, only difference is of course longer run time and longer charge time. I like the inbuilt power indicator which my old ones do not have. At this point I've got 4 Makita batteries so I might not need more until one of these dies or fails to hold a charge. Like I said, the quality and track record has been top notch so I don't expect I'll have to get more any time soon.
E**.
Won’t fit older non star rated tools
I bought these to use as a back up for a new battery powered chop saw, along with be my primary batteries for my little used 6” circular saw. Turns out they didn’t for the latter. The saw didn’t have the star emblem under the base, so these didn’t fit........or did they? Upon some internet searching, checking them in other tools, and comparing them to batteries that fit, the reason they didn’t fit was an extra tab on the battery that prohibited their full insertion into non star tools. Let’s just say removing that tab was easy as pie and now they work where I wanted them to work. I also am sure I voided their warranty. The reason for the tab it to keep them from being used in tools that will discharge them too quickly, causing them to get hot (when used for extended times, not my usage) and therefore damaging the longevity of the batteries. Still a great deal, and I’d do it again if I needed batteries. They are exactly what they were meant to be. Don’t take my misuse as a promotional for doing the same......wink.
C**F
Great Product
I initially ordered the wrong battery replacement for my Mikita drills. After Amazon and the sell did a great job helping me get the right batteries, I received the items as promised. This is the second time I have ordered these batteries for replacements. I am a avid DIYer and used these batteries extensively. They are durable and hold a charge really really well! The life of the batteries lasted as long as I expected. These are great batteries, but are a little pricey. Great product and I would highly recommend these as replacements!
B**.
They work
I have a drill and an impact drill. Batteries work and charge fast. Very easy to attach and detach. They are only used for household maintenance. The batteries are new so I have no information of longevity.
Y**N
Sin muy buenas me gustan
R**E
avaiable
this is the 2nd time ordering these batteries.
B**.
These are all i use with my makita tools
Just make sure you always use makita batteries not knock offs. Have a great day
D**.
I bought genuine batteries for my Makita tools
I have a Makita leaf blower and hedge trimmer. I use the blower in the winter for clearing light, dry snow from my driveway and sidewalks. I used two aftermarket batteries in addition to a Makita branded battery that came with the tools. My son advised me that aftermarket batteries are at higher risk of catching fire and leaking than the branded ones. So I recycled my aftermarkets and replaced them with these genuine Makitas. I'm confident that all my batteries will power my tools safely for the long term.
L**N
Excellent, my father enjoys them very much!
Y**R
Been using 3amps for many years now. Figure id upgrade. Cant wait to try them out. Im expecting almost a full day of uasage on the 4amps.
T**E
The batteries were completely discharged. After cycling them a few times they seem ok. We will see in the future how they hold up.
Trustpilot
5 days ago
3 weeks ago