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  • SF-SF18650B

    Surefire SF18650B Micro USB Lithium Ion Rechargeable Battery

    Charge. Win. Repeat. The SF18650B is a Lithium Ion-protected 18650 battery with MICRO-USB charge capability. This allows the user to conveniently charge the battery using any USB power source such as a USB wall charger, computer/laptop, power bank, or automotive USB port using the included MICRO-USB to USB cable. Additionally, an external 18650 compatible CC-CV cradle charger (not included) can be used to charge the battery; possibly at a faster rate if so equipped. The SF18650B is compatible with the following SureFire products: FURY-DFT, FURY-IB-DF, P1R-A-BK (discontinued), P1R-B-BK, M600DF-BK, M600DF-TN, M640DF-BK-PRO and M640DF-TN-PRO.

    Features of Surefire SF18650B Micro USB Lithium Ion Rechargeable Battery

    • The new champion among SF18650 rechargeable batteries
    • 3.6 volts / 3500 mAh deliver extended runtime
    • MICRO-USB charging facilitates charging via a variety of power sources
    • High-performance 3.6V 18650 lithium ion rechargeable battery with MICRO-USB port for ease of charging – no charging cradle needed
    • When plugged into a power source, two LED indicators display the current charge state: Red for charging and Green for fully charged
    • 3,500 mAh for extended battery runtime
    • 8-10A discharge rate for dependability in high drain devices such as LED flashlights


    Key Attributes
    Type Protected 18650
    Voltage 3.6V
    Certification CE, PSE, UN38.3
    Charge End Voltage 4.20V
    Chemistry Lithium-ion
    Dimensions 69.4 x 18.6 mm
    Discharge End Voltage 2.50V
    Discharge Rate 8-10A
    Energy 12.6 Wh
    Lithium Content 10.5 g
    Operating Temp Range (Discharging) 0-45ºC, 65%±25%RH
    Operating Temp Range ( Discharging) -20ºC-+60ºC, 65%±25%RH
    Rated Capacity 3.5Ah
    Standard Charge Rate Charging through USB can take over 8 hours if fully depleted. Approximately 5 hours of flashlight cutoff
    Storage Temp Range 0-35ºC 60±25%RH
    USB Current 600mA ± 100mA
    USB Charge Voltage 5.0V ± 0.2V
    Weight 1.7 oz (49 g)