EnerPower+ 18650 2900mAh (Blue) 2015
Button top version
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Official specifications:
- Nominal Capacity: 2,850mAh
- Typical Capacity: 2,850mAh
- Minimum Capacity: 2,750mAh
- Charging Voltage: 4.20 ± 0.05 V
- Nominal Voltage: 3.65V (0.2C discharge)
- Charging Method: CC-CV (constant voltage with limited current)
- Charging Current Standard charge: 1,375mA
- Charging Time Standard charge: 3hours
- Max. Charge Current: 2750mA (not for cyclelife)
- Max. Discharge Current: 2,750mAh (continuous discharge), 8250mAh (not for continuous discharge)
- Discharge Cut-off Voltage 2.50V
- Cycle life: 500 cycles to 70%
- Cell Weight max.: 48g
- Cell Dimension: Diameter max.: 18.40mm, Height max.: 65.00mm
- Operating Temperature (Cell Surface Temperature): Charge: 0 to 45°C, Discharge: -20 to 60°C
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A high capacity cell with good cycle life but not designed for high currents.
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Very nice discharge curves with good tracking and only a moderate capacity drop when loaded.
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Flat top version
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Official specifications: See above
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The flat top version of the cell, notice that it is a added flat top that is flush with the battery top.
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And the curve is just as good as the ones for the button top cells.
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Conclusion
Very good cells as long as you do not need more than a few ampere.
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