SureFire SF18650B Rechargeable 18650 Lithium-ion Battery with Micro-USB Charging, 3.6V 3500mAh

SKU: FLX-136934

Vendor Surefire
Regular price $35.98
Sale price $35.98 Regular price
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Product Description

The SureFire SF18650B is a protected 18650 lithium‑ion rechargeable battery designed for dependable performance in high‑drain devices. It features a built‑in Micro‑USB charging port, so you can charge directly from common USB power sources without a separate cradle. Dual LED indicators show charging status (red for charging, green for fully charged). With a rated capacity of 3,500 mAh and an 8–10A discharge rate, the SF18650B delivers extended runtime and reliable output for compatible SureFire lights including FURY‑DFT, FURY‑IB‑DF, EDC2‑DFT, M600DF, M640DF, M640DFT and P1R series. A Micro‑USB to USB cable is included, and the cell can also be charged in a compatible CC‑CV 18650 cradle (not included).

Product Highlights

  • Built‑in Micro‑USB charging—no external cradle required; includes charging cable
  • High‑capacity 3,500 mAh cell optimized for extended flashlight runtime
  • Protected 18650 design with 8–10A discharge rate for high‑drain LED lights
  • Dual LED indicators provide clear charging status feedback
  • Compatible with select SureFire models: FURY‑DFT, FURY‑IB‑DF, EDC2‑DFT, M600DF, M640DF/M640DFT, and P1R series

Specs

  • Type: Protected 18650 rechargeable battery
  • Chemistry: Lithium‑ion
  • Nominal Voltage: 3.6 V (charge end voltage 4.2 V)
  • Rated Capacity: 3.5 Ah (3,500 mAh)
  • Energy: 12.6 Wh
  • Discharge Rate: 8–10 A
  • Discharge End Voltage: 2.50 V
  • USB Charge Voltage: 5.0 V ± 0.2 V
  • USB Charge Current: 600 mA ± 100 mA
  • Typical Charge Time: ~5 hours from flashlight cutoff; up to 8+ hours if fully depleted
  • Dimensions: 69.4 x 18.6 mm
  • Weight: 1.7 oz (49 g)
  • Operating Temp Range (Charging): 0–45 °C, 65% ±25% RH
  • Operating Temp Range (Discharging): −20 °C to +60 °C, 65% ±25% RH
  • Storage Temp Range: 0–35 °C, 60% ±25% RH
  • Certifications: CE, PSE, UN38.3
  • Lithium Content: 1.05 g
  • Included: Micro‑USB to USB charging cable
  • Compatibility: FURY‑DFT, FURY‑IB‑DF, EDC2‑DFT, M600DF, M640DF, M640DFT, P1R series
  • Country of Manufacture: China
  • UPC: 084871328050
  • Manufacturer Part Number: SF18650B
  • Brand Name: SureFire

Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product’s manufacturer.

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