AWT IMR18650 2500mAh (Yellow)



Official specifications:

• Model: AWT battery 18650 35Amp 2500mAh
• Type: li-ion battery cell (flat top or button top )
• Size: 18650
• Nominal capacity: 2500mah 35Amp
• Nominal voltage: 3.7 V
• Charge current and Time: Standard Charge: 0.5C Time: Approx 5 hours, Rapid charge: 1.0C Time: Approx 2.5 hours
• Standard Charging method: 0.5C CC(constant current)charge to 4.2V,then CV(constant voltage 4.2V)charge till charge current decline to 0.01C
• Max.charge current: Constant Current 1C Constant Voltage 4.2V 0.01 C cut-off
• Max.discharge current: Constant current 1.0C end voltage 2.75V
• Standard Discharge Current: Constant current 0.2 C end voltage 2.75V
• Discharge cut-off voltage: 4.2V
• Charge cut-off Voltage: 2.75 V
• Initial Impedance: <80mOhm
• Weight: Approx:60g
• Operating temperature: Charging: 0°C~45°C, Discharging:-20°C~60°C
• Storage temperature: -5°C~35°C
• Storage Humidity: <75% RH
• Standard environmental condition: Temperature : 23±5°C, Humidity : 45-75%RH, Atmospheric Pressure: 86-106 Kpa

This is a 2500mAh cell will very high current rating. The 35A is a bit optimistic.










These curves shows a very good battery, there is a good tracking between the batteries and not much capacity drop from 0.2A to 20A, but the voltage drops significantly at 30A.















Conclusion

Usual a battery with unspecified cell will not get better rating than acceptable, but there is no doubt it is a very good cell that is used here.



Notes and links

The batteries was supplied by AWT 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