Eizfan IMR21700 5000mAh (Black-purple) 2019
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Official specifications:
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Model: IMR 21700
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Rated Capacity: 5000mAh
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Nominal Voltage: 3.7V
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Voltage at end of discharge: 2.9V
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Standard charge current: 740mA
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Max. Charge Current: 3700mA
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Max. continuous discharge current: 10A
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Max. pulse discharge current: 15A
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Charging temperature range: 0C to 45C
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Discharge temperature range: –10C / –60C
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Inner resistance: 16mOhm
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Cell size : 21.8mm x 70.6mm
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Weight: 85g/pc
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Very high capacity 21700 batteries, this also means that they are not high current.
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The cells matches perfectly and they can deliver the rated current, at any higher current they will get into heat problems.
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Conclusion
A very good high capacity cell.
Notes and links
The batteries was supplied by Eizfan (Efan) 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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries