Fenix 21700 Rechargeable Li-Ion Battery – 5000 mAh

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This 21700 battery from Fenix can handle twice the power of a standard 18650 battery. The additional mAh's allow flashlights like the PD36R and TK22 to have longer run times. What makes this 21700 battery even better is the USB Type-C charging port that is embedded in the cell. You don't have to use a separate charger to charge the battery; it can all be done with a wall adapter and USB Type-C charging cord. It is likely that you already have these in your home since many cellphones use this same type of charging port.



  •   5000mAh Capacity
  •   USB Type-C Charging
  •   500 Charging Cycles
  •   Protection Circuits in Anode


  • Overcharge Protection
  • Over-discharge protection
  • Short Circuit Protection
  • Overheat protection
  •  3 sets of overheating protection
  • Pressure relief valve
  • Microporous
  • PTC Cathodal Block
  •   3.6V
  •  USB Charging - USB-A to USB-C Cable - Single Port Charger 1 Amp/2 Amp at 10 Watts Max
  •  Maximum Output Current 8A
  •  Weight: 2.56 oz / 72.5g
  •  Dimensions: 2.99" Height x 0.85" Diameter

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