SureFire SF18650B 18650 Micro-USB Rechargeable Battery 3.6V 3500mAh

The SureFire SF18650B is a protected 18650 lithium-ion rechargeable battery with an integrated Micro-USB port for convenient charging from USB power sources. Two LED indicators display charge status: red while charging and green when fully charged. It delivers a nominal voltage of 3.6 volts and a rated capacity of 3,500 mAh for extended runtime in high-drain devices. The cell’s protection and robust discharge capability make it suitable for LED weapon lights and other demanding portable electronics.

Key Specifications

• The battery provides a nominal voltage of 3.6 Volts.
• The rated capacity is 3,500 mAh for extended runtime.
• Charging is via the integrated Micro-USB port and includes a Micro-USB charging cable.
• Typical charge time is approximately 8 hours when fully depleted using USB charging.
• This is a protected 18650 Lithium-Ion cell design.
• The battery carries certifications of CE / PSE / UN38.3.
• The discharge capability is rated at 8–10 A for high-drain devices.
• The finish and housing color are Red/Black.
• Physical dimensions are approximately 2.73 inches long with a diameter of 0.73 inches.
• The unit weight is approximately 1.70 oz.

Designed for reliable power in high-demand flashlights and accessories, the SF18650B combines onboard USB charging and clear LED charge status for straightforward maintenance of your gear. Its protected construction and industry certifications support consistent, standards-compliant performance for everyday carry and field use, while the 3,500 mAh capacity helps reduce downtime between charges.