Power Supply Kit Makita 18V BL1850Bx4 DC18RD – 4 x BL1850B 18V batteries with DC18RD dual charger

The Power Supply Kit Makita 18V BL1850Bx4 DC18RD contains four genuine Makita BL1850B 18V lithium-ion batteries and the DC18RD dual rapid charger. This kit is designed to extend runtime for 18V Makita cordless tools by providing multiple fully compatible batteries and a charger that can charge two batteries sequentially or simultaneously. The combination supports continuous operation on job sites, in workshops and for trade professionals who require dependable battery capacity and efficient recharge cycles.

Advantages

The included BL1850B batteries deliver high-capacity 18V power with stable voltage under load and integrated protection circuitry to help prevent over-discharge and overheating. The DC18RD dual rapid charger accepts two batteries at once and optimizes charging to minimize downtime; it also supports different charging modes to allow safe and efficient recharging of each battery. All components are genuine Makita parts, ensuring mechanical and electrical compatibility with 18V Makita tools and chargers.

Suitable for

• Construction sites and general contracting where long runtime is required
• Workshops and maintenance facilities with frequent tool use
• Tradespeople such as carpenters, electricians and plumbers who need reliable backup batteries
• Continuous operation scenarios where batteries are rotated while charging

Key specifications

• Battery chemistry: lithium-ion
• Nominal voltage: 18 V
• Battery capacity: high-capacity cells (BL1850B family)
• Quantity: four batteries included
• Charger type: dual rapid charger with two charging bays
• Charger functions: sequential or simultaneous charging, temperature and charge monitoring
• Compatibility: designed for 18V Makita cordless tools and battery platform

How to use

Install a charged BL1850B battery into a compatible 18V Makita tool following the tool manufacturer’s instructions. When batteries run low, place depleted units into the DC18RD charger; the charger will detect battery status and apply the appropriate charging current. Rotate batteries so at least one charged battery is available on-site while others charge. Observe the charger indicators to confirm charge completion before reinstalling a battery into a tool.

Usage recommendations

Store batteries at moderate temperature and avoid prolonged exposure to heat or moisture. Use the DC18RD charger on a stable, dry surface and follow Makita safety guidance: remove batteries from tools before charging, do not attempt to open or modify battery packs, and replace batteries that show physical damage or reduced runtime. For best results in professional use, keep spare batteries charged and rotate them to balance wear.