Test/review of BestFire IMR26650 6000mAh (Purple)

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HKJ
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Test/review of BestFire IMR26650 6000mAh (Purple)

BestFire IMR26650 6000mAh (Purple)
DSC_6782
Official specifications:


  • Short Circuit Protection: No
  • Battery Capacity (FastTech Tested): 4616.5 mAh
  • Battery Capacity (Mfg Rated): 6000 mAh
  • Battery Chemistry: Li-MP
  • Battery Feature: Rechargeable
  • Battery Form Factor: 26650
  • Battery Rated Voltage: 3.7 V
  • Diameter: 26.2 mm
  • Height: 65 mm

BestFire%20IMR26650%206000mAh%20(Purple)-info
A “high” capacity, high current rated cell.
DSC_6781
DSC_6783 DSC_6784
DSC_6785
DSC_6786
BestFire%20IMR26650%206000mAh%20(Purple)-Capacity
The two cells are not the same, they match in capacity, but the internal resistance is different (It is more obvious on the time charts). This also means there is a difference in current handling ability.
BestFire%20IMR26650%206000mAh%20(Purple)-Temp-15.0
One cell cannot handle 15A
BestFire%20IMR26650%206000mAh%20(Purple)-Temp-20.0
The other cell can handle 20A continuous drain.
BestFire%20IMR26650%206000mAh%20(Purple)-Temp-30.0
But it gets to hot at 30A.
BestFire%20IMR26650%206000mAh%20(Purple)-CapacityTimeHours
BestFire%20IMR26650%206000mAh%20(Purple)-CapacityTime
BestFire%20IMR26650%206000mAh%20(Purple)-Energy
BestFire%20IMR26650%206000mAh%20(Purple)-PowerLoadTime
BestFire%20IMR26650%206000mAh%20(Purple)-TripCurrent
The internal resistance I calculate is 78mOhm and 44mOhm, this is a large difference.
BestFire%20IMR26650%206000mAh%20(Purple)-Charge
Conclusion
I am not very impressed with the huge difference in internal resistance and I would not draw 60A from the good cell.
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
Compare to 26650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/