HKJ
Flashaholic
[size=+3]Efest IMR18650 2500mAh (Purple) 2017[/size]
Official specifications:
A 2500mAh high current 18650 cell.
The discharge curves looks very good with nearly constant capacity up to 20A.
The cell do get fairly hot at 20A as can be seen I stopped discharge on one of the cells.
At 30A the cells did not get as warm. It is a new battery holder because the old one was damaged (Heat melted something in it).
[size=+3]Conclusion[/size]
The batteries looks like a good battery, but compare to the Efest 2600 I wonder why they have this battery (It may be due to price).
[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
Compare to 18650 and other batteries
Official specifications:
- Rated capacity: 2500mAh
- Nominal voltage: 3.7V
- Voltage at end of discharging: 2.5V
- Max. charging current: 4A
- Standard charge: 2A
- Discharging current 20A
- Pulse discharging current: 35A
- Charging temperature range: 0°C ~ 45°C
- Discharging temperature range: -20°C ~ 75°C
- Inner resistance: 20mOhm
- Cell size: 18.50 (±0.20)mm x 65.20 (±0.2)mm
A 2500mAh high current 18650 cell.
The discharge curves looks very good with nearly constant capacity up to 20A.
The cell do get fairly hot at 20A as can be seen I stopped discharge on one of the cells.
At 30A the cells did not get as warm. It is a new battery holder because the old one was damaged (Heat melted something in it).
[size=+3]Conclusion[/size]
The batteries looks like a good battery, but compare to the Efest 2600 I wonder why they have this battery (It may be due to price).
[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
Compare to 18650 and other batteries
