Makita BL1850B 18V LXT 5.0Ah Battery – Fast Charge, Longer Run Time

Boost your cordless toolkit with the Makita BL1850B 5.0Ah battery

The Makita 18V LXT Lithium-Ion battery is built to keep your tools ready when you need them most. This 5.0Ah pack emphasizes efficiency and reliability, delivering noticeably longer operation between charges and a rapid recharge that minimizes downtime on busy workdays.

Compared with earlier 18V models, the BL1850B can offer up to 65% more runtime per charge, giving you more time on the job before swapping packs. When it’s time to recharge, expect a full charge in about 45 minutes or less with the appropriate charger, so you can get back to work sooner rather than later. The battery’s design includes a convenient integrated LED indicator to help you monitor charge status at a glance, without interrupting your workflow.

Built for tough conditions and long life

This battery is engineered to perform in the real world—whether you’re on a chilly job site or in hot, dusty environments. It maintains consistent power and run time even in extreme temperatures and features STAR Protection Computer Controls to help guard against overload, over-discharge, and overheating. The outer shell is impact-resistant, and an inner liner absorbs shocks, helping to protect the cells during demanding tasks.

Sixteen contact terminals maintain a steady connection with your tool, helping prevent power dips during high-vibration use. The BL1850B also resists self-discharge, meaning it stays ready for use after periods of storage. For optimized charging and battery health, pair it with Makita’s Rapid Optimum Charger (sold separately), which communicates with the pack to monitor current, voltage, and temperature, and includes a built-in fan for faster, cooler charging in hot conditions.

Key benefits at a glance

• Up to 65% more runtime per charge versus BL1830
• Full charge in 45 minutes or less with compatible charger
• Integrated LED indicator to monitor charge level
• Star Protection for safer operation with compatible tools
• Excellent performance in cold weather (-4°F / -20°C)
• Durable outer case and shock-absorbing liner for site use
• 16 contact terminals ensure stable power during high vibration
• Resists self-discharge, staying ready long after storage

On-the-job scenarios

Expect smoother performance across a range of cordless tools, from drilling and fastening to cutting and sanding. The BL1850B is designed to slot into your Makita 18V lineup with confidence, offering longer sessions between charges and a quick top-up when needed. While it’s not a universal guarantee of faster outcomes, it’s a practical upgrade for users seeking dependable power and reduced downtime.