BestFire IMR26650 6000mAh (Purple)
/DSC_6782.jpg)
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.png)
A "high" capacity, high current rated cell.
/DSC_6781.jpg)
/DSC_6783.jpg)
/DSC_6784.jpg)
/DSC_6785.jpg)
/DSC_6786.jpg)
/BestFire%20IMR26650%206000mAh%20(Purple)-Capacity.png)
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.png)
One cell cannot handle 15A
/BestFire%20IMR26650%206000mAh%20(Purple)-Temp-20.0.png)
The other cell can handle 20A continuous drain.
/BestFire%20IMR26650%206000mAh%20(Purple)-Temp-30.0.png)
But it gets to hot at 30A.
/BestFire%20IMR26650%206000mAh%20(Purple)-CapacityTimeHours.png)
/BestFire%20IMR26650%206000mAh%20(Purple)-CapacityTime.png)
/BestFire%20IMR26650%206000mAh%20(Purple)-Energy.png)
/BestFire%20IMR26650%206000mAh%20(Purple)-PowerLoadTime.png)
/BestFire%20IMR26650%206000mAh%20(Purple)-TripCurrent.png)
The internal resistance I calculate is 78mOhm and 44mOhm, this is a large difference.
/BestFire%20IMR26650%206000mAh%20(Purple)-Charge.png)
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