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[size=+3]Efest IMR18650 2000mAh (red)[/size]
V1 Flat top
Official specifications:
Internal resistance is calculated between 4A and 5A
Acceptable performance up to 7A, but they have problems with 10A.
V2 Button top
Official specifications:
Internal resistance is calculated between 4A and 5A
Acceptable performance up to 5A, but they have problems with 7A and 10A.
[size=+3]Conclusion[/size]
These batteries are supposed to be IMR cells, but their performance it not good at high currents.
At 5A and below they do have an acceptable performance.
[size=+3]Notes and links[/size]
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
V1 Flat top
Official specifications:
- Efest IMR 18650
- Brand: Efest Model: 18650 V1
- High Drain battery
- Capacity:2000mah Material: Li-Mn
- Positive Pole: flat top
- Sizes: 18.11(L)*65.02(W)mm
Internal resistance is calculated between 4A and 5A
Acceptable performance up to 7A, but they have problems with 10A.
V2 Button top
Official specifications:
- Nominal Voltage: 3.7v
- Battery Model: 18650v Capacity: 2000mAh
- LiMn High Drain battery
- Positive: Nipple Top
- Cycle Life: 500 Cycles
- Max Charging Rate: 4.5amps
- Sizes: 18.10(L)*66.06(W)mm
Internal resistance is calculated between 4A and 5A
Acceptable performance up to 5A, but they have problems with 7A and 10A.
[size=+3]Conclusion[/size]
These batteries are supposed to be IMR cells, but their performance it not good at high currents.
At 5A and below they do have an acceptable performance.
[size=+3]Notes and links[/size]
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