Surefire Micro-USB Rechargeable 18650 Protected Lithium Ion Battery

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The Surefire Lithium 18650 battery allows for convenient charging using any power source such as a USB wall charger, computer/laptop, power bank, or automotive USB port using the included MICRO-USB to USB cable. The external 18650 compatible CC-CV cradle charger (not included) can be used to charge the battery; possibly at a faster rate if so equipped.


  • 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


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