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Makita BL1820B 18V Compact Lithium-Ion 2.0Ah Battery, Black

Based on 1,549 reviews
Condition: New
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$50.99
Holiday Deal · 7% off was $54.99

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Nov 14 – Nov 15
Order within 10 hours and 58 minutes

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At a glance

Condition
New
Battery Capacity
2000 mAh
Total product quantity
1 Count
Model
BL1820B
Dimensions
3 x 6.75 x 6.5 in
Weight
13.44 oz
Voltage
18 volts
In the box
battery
Warranty
3-year limited warranty

Features 5

  • Integrated L.E.D. battery charge level indicator allows user to monitor battery charge
  • Provides up to 50% more run time per charge compared to BL1815
  • Reaches full charge in 25 minutes or less
  • Compatible with 18V LXT Tools

Description

EFFICIENCY : Integrated L.E.D. battery charge level indicator allows user to monitor battery charge VERSATILITY : Reaches full charge in 25 minutes or less PERFORMANCE : Compatible with 18V LXT® Tools CONVENIENCE : Makita Lithium-Ion battery provides longer run time INCLUDES : 18V LXT® Lithium-Ion Compact 2.0Ah Battery About Model The Makita 18V Compact Lithium-Ion battery charges faster and works longer than standard 18V compact lithium-ion batteries, giving you and your Makita cordless tools unmatched performance and productivity in a compact size. The Makita 2.0 Ah battery delivers up to 50% more run time per charge than the Makita BL1815 18V Compact battery, with a fast charge time of only 25 minutes for increased efficiency. Makita 18V 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 largest cordless tool line-up powered by 18V lithium-ion slide-style batteries. Features Integrated L.E.D. battery charge level indicator allows user to monitor battery charge Provides up to 50% more run time per charge compared to BL1815 Reaches full charge in 25 minutes or less Compatible only with Star Protection tools, indicated by the Star Symbol™ and/or Yellow Battery Receiver under the tool Battery delivers consistent power and run time in extreme temperatures, even in winter (-4°F/-20°C) Equipped with Star Protection Computer Controls™ to protect against overloading, over-discharging and over-heating Impact- resistant outer case and shock-absorbing inner-liner are engineered to protect the battery Sixteen 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 Makita 18V Lithium-Ion is the world’s largest cordless tool line-up powered by an 18V Lithium-Ion slide-style battery Makita technology delivers category-leading charge time so the battery spends more time working and less time sitting on the charger (charger not included) 3-year limited warranty Specs System : 18V LXT® Voltage : 18V Battery Capacity (Ah) : 2.0Ah Battery Type : Lithium-Ion Battery Charge Time (minutes) : 25 Package Quantity : 1 Shipping Weight : .98 lbs. UPC Code : 088381-463874

Specs 20

Number of Batteries 1 Lithium Ion batteries required. (included)
Brand Makita
Battery Cell Composition Lithium Ion
Battery Capacity 2000 mAh
Recommended Uses For Product Vacuum Cleaner
Model Number BL1820B
Model Name Makita BL1820B 18V Compact Lithium-Ion 2.0Ah Battery
Global Trade Identification Number 74

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 14 – Nov 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Genuine Makita
Size: 2.0Ah Style: 1-Pack
My Makita will only work with genuine Makita batteries unfortunately because they are so expensive but this is genuine and very expensive but great!
Reviewed in the United States on October 4, 2026 by beth RA

real deal batteies
Size: 2.0Ah Style: 2-Pack
i bought these over the generic brands because i wanted a product with no issues. batteries work great and really last - the 2 amp hr are light weight so great for the hand held tools. didn't last so long when used on the dyson vacuum - a little dissapointing
Reviewed in the United States on August 14, 2024 by S. Cross

Awesome for Makita Jackets.
Size: 2.0Ah Style: 1-Pack
I bought this to use with my Makita 18v heated jacket. It's a great size that doesn't weigh down the pocket or stick out too much. That high quality you can expect from Makita. Lasts about 4-5 hours in my jacket on high. Don't know about tools cause I use all 40v. Charges in about 10 minutes in my experience, which is always great ... show more
Reviewed in the United States on October 30, 2025 by Lindsey

shoulda got one sooner
Size: 2.0Ah Style: 1-Pack
I have many Makita tools but only had 5amp hour and 4 ah batteries. This little guy is great for short jobs, lasts longer than i thought, love it!
Reviewed in the United States on April 15, 2026 by Doc Spook

Reliable
Size: 2.0Ah Style: 1-Pack
Great value and last a while between charges.
Reviewed in the United States on September 13, 2026 by Dave Amazon Customer

Less juice than 3Ah, but super light and charges very fast.
Size: 2.0Ah Style: 2-Pack
Nice and light, fine for smallish tasks. Still, nothing to sneeze at compared to Ryobi 18+. (I have a Ryobi in the house, Makita in the shop) If you are just working on a weekend project, these provide enough juice for a few hours of use. Use the 3 Ah or 4 (or 5)Ah for the longer jobs, and these when you want to lighten your arm. These are noticeably less juice than the 3Ah, but that's the tradeoff for being light and small. The other uptick is, charging time is super fast. ... show more
Reviewed in the United States on July 20, 2016 by Victor

Perfect
Size: 2.0Ah Style: 1-Pack
Exactly what I needed to replace my original Makita drill battery.
Reviewed in the United States on April 20, 2026 by pamela k. iversen

If you carry your impact in a holster or do overhead work, this is worth it
Size: 2.0Ah Style: 1-Pack
I bought this primary for my impact. I got a tool belt but the 5AH batteries add so much weight it felt like a lead weight hanging off my hip. This battery fixes that problem at the cost of battery life of course. If you're holding a tool overhead a lot this battery also helps with fatigue. Hopefully it lasts, I have had 3 Makita batteries fail, two 5AH and one old 3AH. The 3AH I tried to charge when it was cold and Makita in it's infinite wisdom turns the battery into an expensive brick after it records 3 failed charge attempts. The other two failed to charge randomly, with one of those having the flashing battery charge level LEDs of doom. Makita replaced the 5AH ones under warranty. The first one turned around in a few days from the repair center, the second one took over a month. I think Makita has consolidated it's repair centers on the West coast and now it's taking much, much longer for service as the remaining repair centers are overloaded. If you're a pro who needs fast repair service beware. ... show more
Reviewed in the United States on December 18, 2023 by MB
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