UltraFire BRC26650 7300mAh (Gray)
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Official specifications:
- Capacity: 7300mAh
- Voltage: 3.7V
- Chemistry: Li-ion
- Recharge: up to 1000 cycles
/UltraFire%20BRC26650%207300mAh%20(Gray)-info.png)
This cell is specified with record capacity, but the measurements does not confirm this.
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/UltraFire%20BRC26650%207300mAh%20(Gray)-Capacity.png)
The real capacity is about 2500mAh and the two cells do not track very well when current is above 3A.
/UltraFire%20BRC26650%207300mAh%20(Gray)-CapacityTimeHours.png)
/UltraFire%20BRC26650%207300mAh%20(Gray)-CapacityTime.png)
/UltraFire%20BRC26650%207300mAh%20(Gray)-Energy.png)
/UltraFire%20BRC26650%207300mAh%20(Gray)-PowerLoadTime.png)
/UltraFire%20BRC26650%207300mAh%20(Gray)-TripCurrent.png)
/UltraFire%20BRC26650%207300mAh%20(Gray)-Charge.png)
Conclusion
The cell is sold with wrong specifications, the performance is very bad and the wrapper lies about protection.
I will call this a bad 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