Efest IMR16500 900mAh (Red) 2014
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Official specifications:
- Typical Capacity: 900mAh
- Min capacity: 900mAh
- Cycle life: 500 times
- Weight: 38g
- Length: 50.07mm
- Diamter: 16.73mm
- Top: flat top
- Protected: unprotected
- Discharge cut-off voltage: 3.2V
- Voltage: 3.7v
- Full Charge voltage: 3.7v
- Discharge temperature range:- 10°C—60°C
- Carge temperature range: 0°C—40°C
- Storage: 1 year:-20°C—25°C, 3 months:-20°C—45°C, 1 month:-20°C—60°C
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This cell is a 16500 cell, i.e. a 18500 cell on diet or maybe a fat 14500, being a 16500 it is also fairly short. Because it is a high current cell the capacity is not record breaking, but it is better than high capacity 14500 cells.
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There is fairly good tracking between the two cells and they can easily deliver 5A, but fails at 10A.
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Conclusion
The cell is better than any 14500 cell but cannot match the 18500 cells. This is as expected.
Notes and links
The batteries was supplied by Efest 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