BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger & Maintainer | 1.5A

Versatile, Automatic Battery Care for Off-Season or Everyday Use

The BLACK+DECKER BM3B is a compact, high-frequency charger designed to keep batteries ready when a vehicle sits idle or during routine maintenance. It supports both 6V and 12V systems and works with AGM, GEL, and WET batteries, making it suitable for a wide range of vehicles and equipment. From RVs and boats to antique cars and power sports gear, this charger helps you stay on top of battery health without guesswork. Attach quickly with the included battery clips or O-ring terminals, and switch voltage with a simple toggle for a seamless setup.

Whether you’re preparing for the next season or keeping a stored battery primed, the BM3B offers a practical, low-maintenance solution. Its compact design fits into tight spaces, while clear indicators guide you through a smooth connection process. The result is a ready-to-use battery that’s less prone to unexpected outages when you need it most.

Smart Charging and Float Maintenance

Charging automatically stops when the battery is full or topped off, then the unit transitions to float mode to maintain readiness. This approach minimizes unnecessary cycling while helping preserve capacity over time. It’s a thoughtful balance between fast top-ups and long-term battery health.

Safety, Reliability, and Convenience

A built-in circuit protection system guards against overcharging, reverse polarity, and short circuits. The BM3B is ETL certified for performance and safety, offering dependable operation in daily use. A built-in mounting bracket adds flexibility in where you install the unit, keeping cables organized and out of the way.

Flexible Setup for a Variety of Batteries

Switch between 6V and 12V as needed, ensuring compatibility with a range of battery chemistries. Connection options include battery clips or O-ring terminals for dependable, low-effort setup that fits your preferred workflow.

Ideal for a Broad Range of Applications

• RVs, boats, and marine deep cycle batteries
• Antique and classic vehicles needing periodic top-offs
• Motorcycles, lawn mowers, ATVs, and snowmobiles
• Personal watercraft and other stored equipment

• Charges and maintains 6V/12V AGM, GEL, and WET batteries
• Clips or O-ring terminals simplify hook-up
• Automatic stop with float mode for ongoing readiness
• Protects against overcharging, reverse polarity, short circuits
• Mounting bracket enables tidy, accessible positioning
• ETL certified for safety and performance

With the BM3B, you can keep batteries healthy and ready without overnight sessions or guesswork. It’s a practical, low-maintenance companion for seasonal storage and routine top-offs alike.

Note: Always follow battery manufacturer guidelines and safe electrical practices during installation and operation.