Vapcell INR18650 2600mAh (Yellow)
Official specifications:
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Model: INR18650
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Size: 18.3*65.2mm
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Nominal voltage: 3.6V
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End-of-charge voltage: 4.20V
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End-of-discharge Voltage: 2.50V
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Typical Capacity: 2600mAh (0.2C discharge)
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Min capacity: 2500mAh (0.2C discharge)
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Weight: Max:48g
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Internal resistance: Max:14mOhm
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Standard Charge: 1500mA,CCCV 100mA cut-off
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Charging Time: 2.5hours(standard charge)
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Quick Charge Current: 3000mA
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Max Continuous Discharge Current: 20000mA
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Operating Temperature: Charging: 0°C ~ 45°C, Discharging: –20°C~70°C
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Storage: Temperature –5°C~35°C, Humidity <75%RH
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Standard environmental condition: Temperature: 23±5°C
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Humidity: 45-75%RH
This is fairly high current batteries with acceptable capacity.
There is a small capacity difference between the two batteries, they do not like very high current discharge (30A)
Something went wrong with the A cell for this test, it was fully charged, but the discharge was skipped.
I wonder about the temperature difference, maybe I forgot to place the sensor on the B cell, but it must have been close.
Conclusion
The batteries handles 15A fine, but 20A is at the limit. Performance is as expected from a high current battery.
Notes and links
The batteries was supplied by Vapcell 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