Test/review of Enerpower 18650 3.2V 1100mAh (Blue)

HKJ · 2018-12-08T15:43:39.000Z

Enerpower 18650 3.2V 1100mAh (Blue)

Official specifications:

Standard capacity: 1100mAh
Capacity range: 1050 ~ 1200mAh
Standard voltage: 3.2V
Internal resistance (1kHz): <=18mOhm
Maximum charge current: 5.5A
Discharge cut-off voltage: 2.5V
Fast discharge current: 11A
Maximum continuous discharge current: 33A
Pulse discharge current: 40A for 10seconds
Cycle characteristic: 500cycles (100% DOD), 1000cycles (80% DOD), 3000cycles (50% DOD)
Working temperature: Charge 0°C ~ 55°C, Discharge –20°C ~ 60°C
Storage temperature: 3 months: –20°C ~ 45°C

This is high current LiFePO4 batteries.

The batteries tracks nicely. The voltage is lower than normal LiIon, but it is stable during most of the discharge.

Conclusion

High current at fairly stable voltage, but not much capacity.
This is a good LiFePO4 high current cell.

Notes and links

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

chadvone · 2018-12-08T16:24:05.000Z

That discharge curve reminds me of Ni-Cads.

Jerommel · 2018-12-08T19:13:00.000Z

Thanks for the test.
Very low capacity, unfortunately…
I think LiFePo may have a bright future for flashlights, since the Vf of LEDs gets lower.
Otherwise you can put them in series…

How about testing these:

http://www.aliexpress.com/item/4PCS-VariCore-Brand-3-2V-32700-6500mAh-LiFePO4-Battery-35A-Continuous-Discharge-Maximum-55A-High-power/32908657643.html

Interesting for Maglite D cell lights.
Enough capacity and current, according to the claimed specs.
A lot of these or similar for sale on AE now.