Shockli IMR26650 5200mAh (Black)
Official specifications:
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Nominal Capacity: 5200mah (1A Discharge)
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Nominal Voltage: 3.7V
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Discharge Cut-off voltage: 2.6 V
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Standard Charge: 1.0 A / 4.2V±0.05V (Recommend 1.0A-2.0A)
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Maximum charge current: 4A
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Continuous Discharge Current: 30A
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MAX Discharge Current: 60A
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Initial Impedance: <=20 mOhm
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Cycle Life: 500 cycles to 60%
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Size(mm): 26.2±0.2mm(Diameter) x 66.6±0.5 mm(Length)
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Weight(g): 95±2g
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Operating environment: Charging, 0°C ~ 45°C, Discharging, –20°C~60°C
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Storage environment: Temp(–20°c –35°c) / Humidity (65±20%)
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This is a high capacity and high current 26650 cell.
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The discharge curves tracks fine and the cell has nearly constant capacity up to 15A. At 20A one of the cells got too hot and I stopped the test.
/Shockli%20IMR26650%205200mAh%20(Black)-Temp-15.0.png)
/Shockli%20IMR26650%205200mAh%20(Black)-Temp-20.0.png)
The cells gets very hot at 20A.
/Shockli%20IMR26650%205200mAh%20(Black)-Temp-30.0.png)
At 30A they discharge before I measure the heat, but they get even hotter.
/Shockli%20IMR26650%205200mAh%20(Black)-CapacityTimeHours.png)
/Shockli%20IMR26650%205200mAh%20(Black)-CapacityTime.png)
/Shockli%20IMR26650%205200mAh%20(Black)-Energy.png)
/Shockli%20IMR26650%205200mAh%20(Black)-PowerLoadTime.png)
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/Shockli%20IMR26650%205200mAh%20(Black)-Charge.png)
Conclusion
This battery has good capacity and can deliver a fairly high current, but the 30A/60A is too optimistic.
Notes and links
The battery was supplied by shockli.com for review.
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