Makita BL1850B 18V LXT 5.0Ah Li-Ion Battery

In-Depth Look

The BL1850B is an 18V, 5.0Ah slide battery in Makita’s LXT range. The “B” in the name indicates the built-in charge level indicator.

Charge Indicator

Four LEDs show the charge level when you press the button on the battery, so you can check a pack without fitting it to a tool.

Capacity

The 5.0Ah pack sits in the middle of the LXT range. Smaller 2.0Ah and 3.0Ah packs are lighter for small tools, while higher capacity packs give longer runtime for demanding tools. The BL1850B weighs about 0.63kg.

Charging and Protection

It takes about 45 minutes to charge on a Makita DC18RC or DC18RA rapid charger. STAR protection is Makita’s system for communication between the tool and the battery.

Counterfeit Risk

Counterfeit Makita batteries are sold online. Buy from a trusted seller and check the packaging and labelling against Makita’s own product information.

Summary

An 18V, 5.0Ah LXT slide battery with a charge level indicator and STAR protection, designed for the 18V LXT range. Check the tool’s page to confirm it takes this battery.

How It Compares

The Makita BL1850B is an 18V, 5.0Ah LXT slide-in lithium-ion battery. It is designed for the 18V LXT range, so check the tool’s page before you buy. It has a charge level indicator with four bars, and STAR protection, a system that communicates between the tool and the battery. It takes about 45 minutes to charge on a Makita DC18RC or DC18RA rapid charger.

The label shows the two numbers that matter most. 18V is the voltage of the pack, and 5.0Ah is the capacity.

Tools that use this pack family include the Makita DHR242 SDS rotary hammer and the Makita DJV182Z brushless jigsaw. The Milwaukee M18 FID3 impact driver is another brand’s platform, which uses its own batteries. Our guide to the cordless tool platform gives more background.

Common Questions

What does 18V 5.0Ah mean? 18V is the voltage of the pack. 5.0Ah is the capacity, so a higher Ah number gives longer use on the same tool.

What do the four bars show? They show the remaining charge. Press the button on the pack to see them.

How long does it take to charge? About 45 minutes on a Makita DC18RC or DC18RA rapid charger. Check the charger you are using.

What is STAR protection? It is Makita’s system where the tool and the battery communicate with each other. It is designed to protect against overload, over-discharge and overheating, and the tool stops if it detects those conditions.

Can I use it on a different brand’s tool? No. Battery packs are brand-specific. Check the tool’s page for the pack it takes.

Use only the charger and instructions the maker specifies, and do not charge a damaged pack.