[HKJ]

Efest IMR18650 3000mAh (Purple) 2017


Official specifications:

• Rated capacity: 3000mAh
• Nominal voltage: 3.7V
• Voltage at end of discharging: 2.5V
• Max. charging current: 4A
• Standard charge: 2A
• Discharging current 35A    Oops, Efest has a typo
• Pulse discharging current: 60A    Oops, Efest has a typo
• 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 high capacity 18650 battery with fairly high current.











The two cells tracks nicely.



They get rather hot at 15A



And even more so at 20A, where I have to stop the discharge due to temperature.

















Conclusion

This cell looks like a very good cell and it can deliver about 15A continious.



Notes and links

The batteries was supplied by Efest for a 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