Efest IMR18650 2000mAh (Red) 2014
V1 flat top
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Official specifications:
- Efest IMR 18650
- Brand: Efest Model: 18650 V1
- Capacity:2000mah Material: Li-Mn
- Positive Pole: flat top
- Sizes: 18.11(L)*65.02(W)mm
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Thse batteries are fairly low capacity and not really high current.
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The batteries do track and can deliver 7A, this is not very impressive for 18650 IMR cells today.
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V2 button top
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Official specifications:
- Nominal Voltage: 3.7v
- Battery Model: 18650v Capacity: 2000mAh
- Positive: Nipple Top (button top)
- Cycle Life: 500 Cycles
- Max Charging Rate: 4.5amps
- Sizes: 18.10(L)*66.06(W)mm
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The flat top batteries are basically the same.
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Conclusion
As IMR batteries they are not very impressive.
At 7A and below they do have an acceptable performance.
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