Test/Review of AWT IMR18650 2000mAh (Yellow)

Batteries and Chargers Rechargeable Batteries
1

AWT IMR18650 2000mAh (Yellow)



Official specifications:

  • Rated Capacity: 2200mAh (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)




A high current 18650 battery. According to specifications I got from AWT the 30A are pulse rating and 15A is continuous rating.










The batteries cannot deliver 30A. The batteries has about the same capacity, but there is a difference in internal resistance.















Conclusion

The battery can deliver a lot of current, but the difference in internal resistance means that it is a bad idea to use them in series especially at high current.


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

Thank you HKJ. More great info as always.

Typically, when you are able to run all the tests with minimal down time between runs, how long does all this testing and reporting of a cell usually take?

3

I usual say a week for the two cells in a test, but the time varies, depending on cell capacity and how many currents I test. The fastest is probably 4 or 5 days and the slowest is probably 9 days (I do not really look at the time). The worst is 4.35 volt because I run 3 sets of test, i.e. 3 weeks.

Because the test is fairly automated the only regular downtime is when replacing cell. There is, of course, Windows! It crashes every few months and it may take a couple of days before I notice it and get the test restarted.

In addition to all the testing I need time to register and take photos of new batteries and some time to write the review. For the battery above I have probably used 2 to 3 hours of my time and as stated above about a week of automated testing.

4

TY for the test. A shame about the batteries internal resistance being so different. Nice cells otherwise.