Test/Review of Windyfire 18650 2600mAh (Green)

Batteries and Chargers Rechargeable Batteries
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Test of Windyfire 18650 2600mAh (Green)

Windyfire 18650 2600mAh (Green)



Official specifications:

  • Brand/model: Windyfire
  • Type of Battery: ICR 18650/2600mAh
  • Size(mm): 18mm(Diameter) x 65mm(Length)
  • Positive Shape: flat top
  • Weight(g): 49±1
  • Nominal Voltage: 3.7V
  • Nominal Capacity: 2630mah(0.2 C Discharge)
  • Minimum Capacity: 2600mah(0.2 C Discharge)
  • Discharge Cut-off voltage: 3 V
  • Standard Charge: 0.5 A /4.2V
  • Maximum charge current: 2.6 A
  • Quick Discharge Current: 5.2A
  • Max Discharge Current: 7.8 A
  • Initial Impedance: 40-55mOhm
  • Cycle Life: 310times: discharging capacity>85%, 510times: discharging capacity>60%
  • Temperature Characteristics: -10°C/0.2C >80% Capacity; 20°C/0.2C =100% Capacity;60°C/0.2C >95%* Capacity
  • Charging Time: Standard charge : 5-7hours, Rapid charge : 2-3hours
  • Operating environment: Charging, 0°C ~ 45°C ; 65±20%RH, Discharging, -20°C~60°C ; 65±20%RH
  • Storage environment: Temp(-20°c -35°c) / Relative humidity (45-75%)




A medium capacity 18650 battery, with full specifications.










Good looking curves, the two cells tracks nicely and capacity varies only a little bit with load.















Conclusion

These 2600mAh cells has very good performance and I will rate them as acceptable.



Notes and links

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries

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Good Day HKJ, :)

Superb review....

Thank You Very Much,

George

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Thanks HKJ for another review. These batteries maintain there capacities surprisingly well, reminds me to not judge a book by its cover! :bigsmile: