Makita’s 18V LXT platform is one of the largest cordless tool ecosystems in the world, with over 300 compatible tools. But with six different battery capacities available — from 1.5Ah to 6.0Ah — choosing the right one for your needs can be confusing.
This guide compares every Makita 18V LXT battery side by side, explains what each one is best suited for, and helps you decide which batteries belong in your kit.
Every Makita 18V LXT Battery at a Glance
The table below compares all current Makita 18V LXT batteries by capacity, weight, cell configuration, and recommended use case.
| Battery Model | Capacity (Ah) | Weight (kg) | Cell Count | Best For | Buy Link |
|---|---|---|---|---|---|
| BL1815N | 1.5 | 0.35 | 5 | Light tasks — impact drivers, drills, LED worklights | Check Price |
| BL1820B | 2.0 | 0.37 | 10 | Light-to-medium use — drivers, small grinders, trim routers | Check Price |
| BL1830B | 3.0 | 0.46 | 10 | General-purpose — combi drills, jigsaws, multi-tools | Check Price |
| BL1840B | 4.0 | 0.56 | 10 | Extended sessions — circular saws, routers, SDS drills | Check Price |
| BL1850B | 5.0 | 0.64 | 10 | Heavy-duty — angle grinders, mitre saws, blowers | Check Price |
| BL1860B | 6.0 | 0.68 | 10 | Maximum runtime — chainsaws, lawn mowers, dust extractors | Check Price |
Understanding Makita LXT Battery Capacities
All Makita 18V LXT batteries use the same slide-on mounting system and are fully cross-compatible with every tool in the LXT range. The difference between models comes down to capacity (measured in amp-hours), which directly affects runtime and weight.
Higher-capacity batteries use more cells, which means they last longer between charges but also add weight to your tool. For overhead work or extended use, this trade-off matters.
BL1815N (1.5Ah) — The Lightweight
At just 350g, the BL1815N is Makita’s lightest 18V battery. It uses a 5-cell configuration rather than the 10-cell layout found in larger packs. This makes it ideal for light-duty tools like impact drivers, LED worklights, and cordless radios where runtime isn’t critical but low weight is appreciated.
BL1820B (2.0Ah) — The Compact All-Rounder
The BL1820B steps up to a 10-cell configuration and adds a battery fuel gauge (the “B” suffix). At 2.0Ah it handles light-to-medium tasks comfortably — think drill drivers, trim routers, and small angle grinders for quick cuts.
BL1830B (3.0Ah) — The General-Purpose Pick
For most DIYers and tradespeople, the BL1830B hits the sweet spot between runtime, weight, and cost. It powers combi drills, jigsaws, and multi-tools through a full day of moderate use without being noticeably heavy.
BL1840B (4.0Ah) — The Extended Session Battery
When you’re running circular saws, routers, or SDS drills for extended periods, the BL1840B gives you roughly 30% more runtime than a 3.0Ah pack. A popular upgrade for professionals who need tools to last through a full shift.
BL1850B (5.0Ah) — The Heavy-Duty Workhorse
The BL1850B is the go-to battery for demanding tools like angle grinders, mitre saws, and blowers. See our Makita BL1850B replacement battery guide for compatible third-party options.
BL1860B (6.0Ah) — Maximum Runtime
The BL1860B is Makita’s highest-capacity 18V battery — ideal for chainsaws, lawn mowers, dust extractors, and cordless vacuums. Check our Makita BL1860B replacement battery guide for affordable alternatives.
Which Makita LXT Battery Should You Buy?
- Occasional DIY: Start with a pair of BL1830B (3.0Ah) batteries.
- Regular trade use: Go with BL1850B (5.0Ah) packs as your daily drivers.
- Garden tools and high-drain equipment: The BL1860B (6.0Ah) gives you the longest runtime.
- Lightweight and overhead work: Keep a BL1820B (2.0Ah) for impact drivers and worklights.
All Makita 18V LXT batteries are fully interchangeable — you can mix and match to suit different tasks throughout the day.
Related Guides
- Makita 18V LXT Battery Compatibility — Full Tool List
- Replacement Battery for Makita BL1850B
- Replacement Battery for Makita BL1860B
- Replacement Battery for Makita BL1830
Frequently Asked Questions
Which Makita LXT battery has the best value?
The BL1850B (5.0Ah) offers the best balance of capacity, weight, and price for most users. It provides excellent runtime for all but the most demanding tools and costs significantly less per watt-hour than the compact 2.0Ah options. For professionals, the BL1860B (6.0Ah) is worth the premium for maximum runtime.
What does the B suffix mean on Makita batteries?
The “B” suffix indicates the battery has a built-in charge level indicator — four LED lights that show remaining charge when you press the check button. For example, the BL1850B has the gauge while the BL1850 does not. Electrically, they are identical. The gauge is a convenience feature that costs a few dollars more.
Is there a Makita LXT battery bigger than 6.0Ah?
Makita has not released an 18V LXT battery larger than 6.0Ah in the standard form factor. For more power, Makita offers the 40V XGT platform with batteries up to 8.0Ah. Alternatively, using two LXT batteries in Makita’s 18Vx2 tools effectively gives you 12.0Ah of combined capacity.
