Battery Review · Makita 18V LXT
Makita BL1850B Review: Is the 5.0Ah Battery the Smart Buy?
Lighter, faster-charging, and less expensive than the BL1860B — but does the 5.0Ah capacity hold up for real job site use? Here's the complete breakdown.
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Updated June 2026 · GetHomeFixed Editorial Team
GetHomeFixed Verdict
4.6 / 5 — Recommended for Home Use
The BL1850B is the better pick for most homeowners and light-duty users. It's lighter than the BL1860B, charges faster, and costs less — with a run time trade-off that only matters if you're running tools continuously for hours. For the majority of home repair and DIY tasks, 5.0Ah is more than enough.
Pros
- Lighter than BL1860B — better for overhead work
- Charges in ~45 min with DC18RD rapid charger
- Star Protection Computer Controls — same as BL1860B
- 3-stage LED charge indicator on battery
- Compatible with all 18V LXT tools (100+ models)
- Lower price than the 6.0Ah version
Cons
- ~20% less run time than the BL1860B per charge
- Not ideal for full-day professional use without a spare
- No USB charging output
Full Specifications
| Specification | BL1850B |
|---|
| Voltage | 18V |
| Capacity | 5.0Ah |
| Cell Chemistry | Lithium-Ion |
| Platform | Makita 18V LXT |
| Protection System | Star Protection Computer Controls |
| Charge Indicator | 3-stage LED (on battery) |
| Charge Time (DC18RD) | ~45 minutes |
| Charge Time (DC18SD) | ~60 minutes |
| Weight | ~1.7 lbs (0.77 kg) |
| Model Number | BL1850B |
BL1850B vs BL1860B — Which Should You Buy?
The choice between 5.0Ah and 6.0Ah comes down to how you actually use your tools. The numbers are close enough that the wrong decision wastes money in either direction.
| Feature |
BL1850B (5.0Ah) |
BL1860B (6.0Ah) |
| Capacity |
5.0Ah |
6.0Ah |
| Run Time vs Other |
Baseline |
~20% more per charge |
| Weight |
~1.7 lbs |
~1.9 lbs |
| Charge Time (DC18RD) |
~45 min |
~55 min |
| Star Protection |
Yes |
Yes |
| Price |
Lower |
Higher |
| Best For |
Home use / occasional tasks |
Heavy / all-day professional use |
Verdict: For home repairs, weekend projects, and occasional use — the BL1850B is the correct buy. If you're a contractor or run tools for 4+ hours daily without stopping to charge, the BL1860B earns its price premium. When in doubt, buy two BL1850Bs rather than one BL1860B — same total capacity, more flexibility.
Makita BL1850B
18V LXT · 5.0Ah · Star Protection · 3-Stage LED Indicator
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Tool Compatibility
The BL1850B uses the same 18V LXT slide-mount connection as every Makita 18V LXT tool since 2005. If your tool says 18V LXT, the BL1850B fits and works.
Drill/Driver (DDF series)
Impact Driver (DTD series)
Circular Saw (DSS series)
Reciprocating Saw (DJR series)
Jigsaw (DJV series)
Angle Grinder (DGA series)
Random Orbit Sander (DBO series)
Rotary Hammer (DHR series)
Blower (DUB series)
String Trimmer (DUR series)
Vacuum (DCL series)
Multi-Tool (DTM series)
Important: The BL1850B is 18V LXT only. It does not fit Makita 12V CXT, 40V XGT, or 36V tools. Always confirm your tool is labeled 18V LXT before purchasing.
BL1850B vs BL1850 — What Changed
The "B" suffix matters. The original BL1850 (no B) lacks Star Protection Computer Controls — the communication layer that monitors load, temperature, and discharge in real time and cuts power before damage occurs.
The BL1850B added Star Protection when Makita updated the LXT line. If you're replacing an older BL1850, the BL1850B is the current standard and will work with all the same tools. The Star Protection circuits only activate with compatible tools, but the battery functions normally in all 18V LXT tools regardless.
Frequently Asked Questions
What tools is the Makita BL1850B compatible with?
The BL1850B is compatible with all Makita 18V LXT tools — drills, impact drivers, circular saws, reciprocating saws, jigsaws, angle grinders, and more. The 18V LXT platform includes over 100 tools using the same slide-mount connection. Confirm your tool is labeled 18V LXT before purchasing.
What is the difference between the BL1850B and the BL1860B?
The BL1850B has 5.0Ah capacity versus 6.0Ah on the BL1860B — roughly 20% less run time per charge. The BL1850B is lighter (~1.7 lbs vs ~1.9 lbs) and less expensive. Both have Star Protection and the same LED charge indicator. For home users and occasional use, the BL1850B is the better value. For professionals running tools all day, the BL1860B pays off.
How long does the Makita BL1850B take to charge?
With the Makita DC18RD rapid charger, the BL1850B charges in approximately 45 minutes from fully depleted — slightly faster than the larger BL1860B due to the lower capacity. Standard chargers (DC18SD) take around 60 minutes.
Is the BL1850B the same as the BL1850?
Not exactly. The BL1850B is the updated version of the original BL1850. The key addition is Star Protection Computer Controls, which monitors the battery against overload, over-discharge, and overheating. The BL1850 (no B suffix) lacks this protection layer. If you're replacing an older battery, the BL1850B is the current standard.
Can I use the BL1850B with older Makita 18V tools?
Yes. The BL1850B is backward compatible with all Makita 18V LXT tools since 2005. Older tools that predate the Star Protection protocol will still accept and run the BL1850B — they simply won't activate the protection circuits. The battery functions normally in all cases.
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