Test/Review of AWT IMR18650 2500mAh (Yellow)

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HKJ
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Test/Review of AWT IMR18650 2500mAh (Yellow)

AWT IMR18650 2500mAh (Yellow)

DSC_6513

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


AWT%20IMR18650%202500mAh%20(Yellow)-info

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

DSC_6512

DSC_6514 DSC_6515

DSC_6516
DSC_6517

AWT%20IMR18650%202500mAh%20(Yellow)-Capacity

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.

AWT%20IMR18650%202500mAh%20(Yellow)-CapacityTimeHours

AWT%20IMR18650%202500mAh%20(Yellow)-CapacityTime

AWT%20IMR18650%202500mAh%20(Yellow)-Energy

AWT%20IMR18650%202500mAh%20(Yellow)-PowerLoadTime

AWT%20IMR18650%202500mAh%20(Yellow)-TripCurrent

AWT%20IMR18650%202500mAh%20(Yellow)-Charge



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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Edited by: HKJ on 09/14/2014 - 11:23
jacktheclipper
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Thanks for the great review , HKJ .

What I do

 

Ruke
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noob question, are most IMR cells on the market manufactured by a few companies like Sony, Panasonic, Samsung and LG, most cells on the market are just rewraps?

I read efest manufacture their own cells…

Thank-you!!!

HKJ
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Ruke wrote:
noob question, are most IMR cells on the market manufactured by a few companies like Sony, Panasonic, Samsung and LG, most cells on the market are just rewraps? I read efest manufacture their own cells... Thank-you!!!

The companies you list are the best LiIon manufacturer. There is also some Chinese LiIon manufactures, but their quality and specifications cannot match the above.

This means that the highest capacity and highest current cells will be from the above companies.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Ruke
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so there are lots of companies that manufacture their own cells, not just rewrapping them and resell them…

HKJ
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Ruke wrote:
so there are lots of companies that manufacture their own cells, not just rewrapping them and resell them...

I do not believe so. The brands we see are probably all re-wraps, but the cell inside is sometimes from Chinese companies.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Ruke
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I am talking specifically on IMR batteries, I know about the LiIon and all the rewraps…

HKJ
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Ruke wrote:
I am talking specifically on IMR batteries, I know about the LiIon and all the rewraps...

I do not believe that IMR is different.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

JaredM
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Would it be fair to guess these are Samsung 25R cells?

https://fundrazr.com/osturaband

No affiliation, just a fan.

shadockan
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If you see the top of the battery , you will see the top of the Samsung 25R.

Hallo everybody here. I am from Greece and i am glad to be here with you all .

Tom E
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HKJ's discharge curves of the Basen 18650 2500mAh and this cell match precisely, and the Basen is listed as a SAM 25R cell. Interesting the true branded Sam 25R tested (green one) seems to be under performing compared to this AWT and the Basen. The AWT's are available at FastTech, but the Basen's seem hard to find.