Test/Review of AWT IMR26650 3800mAh (Yellow)

Batteries and Chargers Rechargeable Batteries
1

AWT IMR26650 3800mAh (Yellow)



Official specifications:

  • Rated Capacity: 3800mAh (0.5CA Discharge)
  • Rated Voltage: 3.7V
  • Internal Resistance: <100mOhm (with PTC)
  • Cut-off Discharge Voltage: 2.75V
  • Charge Upper Limit Voltage: 4.20±0.05V
  • Charging Time(Std): 4.0hours
  • Standard Charging Circuit: 0.2C A
  • Charging Circuit: 0.5C A
  • Standard Discharging Circuit: 0.2C A
  • Fast Discharging Current: 0.5C A
  • Max Discharging Current: 2C A
  • Weight: about 45.5g
  • Height: 65mm
  • Operational Temperature: charge (0 ~ 45°C), discharge (-20 ~ 60°C)
  • Storage Temperature: within 1 month (-20~ 50°C), within 3 months (-20~ 40°C), within 3 months (-20~ 20°C)




A 26650, i.e. considerable fatter than 18650, but the same length. Capacity is higher than 18650, but not as much as the battery volume increase. Depending on where I check the specifications the maximum discharge current varies.










The battery works well up to 7A, higher current do look strange and 30A do not work (I redid the curves at 10A and above, they looked different, but did not improve).















Conclusion

The battery works fine at "lower" currents, but it cannot deliver the current that is printed on it or anything near that. When using 7A or lower the battery looks good, but capacity is a bit low (but higher than rated).



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

2

First comment on this old thread? :smiley:

Well I am looking for a good 26650 with good capacity + high current discharge capability and I bump into this AWT battery. Looks like it is a good battery, but depends on the price too.

3

You might want to check the Shockli 4200 IMR at Mountain Electronics: http://www.mtnelectronics.com/index.php?route=product/product&path=59_108&product_id=679

You can also check HKJ “Battery Comparator’: Battery test-review 26650 comparator

This battery looks like it can be used in series with the Convoy L6; I will know for sure when I receive the Convoy L6.

4

I have these and have similar results, a lot lower than the stated capacity and discharge. I have Thorfire 26650s and they seem to work a lot better.

5

Thank you once more for a thorough battery test. It shows us that a being great in a specific (battery)size not per se means that you are top of your class in all other sizes. My champion still is the Keeppower IMR26650 4200mAh (Black).

Edit. In case that my remarks are perceived as being negative: don’t focus on a particular brand of batteries or chargers. Make up your mind about the size of the batteries you want to put in your light and then go browsing through the extensive research-data HKJ has given to us. I will not buy a single battery or charger without first consulting HKJ’s data.
OK, I forgot about the 26350’s but they are doing just fine :person_facepalming: :slight_smile: