SureFire SF18650B Battery: Reliable, High-Performance Power for Demanding Devices

• The SureFire SF18650B Battery is a high-performance 18650 lithium-ion rechargeable battery designed for reliability and convenience. 
• Equipped with an integrated MICRO-USB charging port, it eliminates the need for an external charging cradle. 
• Boasts a 3.6V output with 3,500 mAh capacity, ensuring extended runtime in critical situations. 
• Features an 8-10A discharge rate, making it dependable for high-drain devices like advanced LED flashlights. 
• Includes LED charge indicators—Red signals charging and Green confirms full charge—for easy monitoring. 
• Compatible with multiple SureFire products, such as the FURY-DFT, EDC2-DFT, and M600DF series. 
• Durable and versatile, it operates in a wide range of temperature conditions, from -20º C to +60º C during discharging. 
• Backed by certifications (CE, PSE, UN38.3) ensuring safety and quality across different applications. 
• Compact and lightweight, with dimensions of 69.4 x 18.6 mm and weighing only 1.7 oz (49 g). 
• Designed for maximum convenience and rugged reliability, this is the battery you can trust to perform anywhere, anytime.

SureFire SF18650B Battery Review

What are some common accessories to add to the SureFire SF18650B Battery?

• MICRO-USB to USB Cable: Includes the necessary cable for convenient charging from various USB power sources. 
• 18650 Compatible CC-CV Cradle Charger: An optional accessory for potentially faster charging speeds. 
• Protective Battery Case: Provides safe storage and transportation for the battery. 
• USB Wall Chargers: Ensures flexibility for charging at home or on-the-go. 
• Power Banks: Allows portable charging options in outdoor or remote settings. 
• Automotive USB Adapter: Enables charging the battery directly in vehicles.

SureFire SF18650B Battery Features and Specs

The SureFire SF18650B Micro USB Lithium-Ion Rechargeable Battery offers high performance, convenience, and dependability for a wide range of compatible devices. With a 3.6-volt output and a 3500 mAh capacity, it provides extended runtime and is capable of handling high-drain devices like LED flashlights. Its built-in MICRO-USB charging port eliminates the need for an external cradle, making it easy to charge using common USB power sources. The battery’s robust design and versatile charging options make it a reliable choice for both everyday and demanding applications.

Key Features

• MICRO-USB charging for convenience—no cradle required 
• Displays charge status with dual LED indicators (Red for charging, Green for fully charged) 
• High capacity of 3500 mAh for longer runtime 
• Handles 8-10A discharge rate, suitable for high-drain devices 
• Compact and lightweight at 1.7 oz (49 g) 
• Designed for performance, with robust certifications like CE, PSE, and UN38.3 
• Operates in a wide temperature range, from harsh cold to high heat   
• Compatible with multiple SureFire products, including flashlights like FURY-DFT, M640DF, and more 

What’s in the box of the SureFire SF18650B Battery?

• (1) SureFire SF18650B Rechargeable Battery 
• (1) MICRO-USB to USB Charging Cable

SureFire SF18650B Battery FAQs

How do I charge the SureFire SF18650B Micro USB Lithium-Ion Rechargeable Battery? 

The SF18650B features a built-in MICRO-USB port, allowing you to charge it directly using a USB power source such as a wall charger, computer, power bank, or car USB port. Simply connect the included MICRO-USB to USB cable to the battery and the power source. You can also use an external 18650-compatible CC-CV cradle charger (not included) to charge the battery.

How can I tell when the SureFire 18650 Li-Ion Battery with Micro-USB Charging Port (3500mAh) is fully charged? 

The SF18650B has two LED indicators to display its charge status. A red light indicates the battery is charging, while a green light means the charging process is complete.

What devices are compatible with the SureFire SF18650B 18650 3500mAh 3.6V Protected Lithium Ion (Li-ion) Button Top Battery with Micro USB Charging Port? 

This battery is compatible with several SureFire products, including the FURY-DFT, FURY-IB-DF, EDC2-DFT, M600DF, M640DF, M640DFT, and P1R series.

How long does it take to fully charge the SureFire SF18650B 3500mAh 3.6V Protected Lithium Ion (Li-ion) Battery with Micro USB Charging Port? 

Charging through the built-in USB port can take approximately 8 hours if the battery is fully depleted. Using an external CC-CV cradle charger may offer faster charging times, depending on the charger’s capability.

Can the SureFire SF18650B 3500mAh 3.6V Protected Lithium Ion (Li-ion) Battery handle extreme temperatures? 

Yes, the battery is designed to operate in a wide range of temperatures. For charging, the ideal range is 0-45ºC, and for discharging, it works between -20ºC and +60ºC.

What is the runtime offered by the SureFire SF18650B 3500mAh 3.6V Protected Lithium Ion Button Top Battery with Micro USB Charging Port? 

With a rated capacity of 3,500 mAh, this battery provides extended runtime, ensuring consistent performance during prolonged use in high-drain devices like LED flashlights.

Is the SureFire 18650 Micro USB Lithium Ion Rechargeable Battery safe to use? 

Yes, the battery is equipped with protection features and meets international safety certifications such as CE, PSE, and UN38.3, ensuring reliability and safety during operation.

What is the weight and size of the SF18650b Surefire Battery? 

The SF18650B weighs 1.7 oz (49 g) and measures 69.4 mm in length and 18.6 mm in diameter, making it compact and easy to carry.

Can I store the Surefire Micro-USB Rechargeable 18650 Protected Lithium Ion Battery when it’s not in use? 

Yes, the recommended storage temperature range is 0-35ºC with a relative humidity of 60±25%. Following these guidelines will help maintain the performance and lifespan of the battery.