Test/review of Keeppower 26650 5500mAh P2655C (Black)

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]Keeppower 26650 5500mAh P2655C (Black) 2020[/size]

DSC_4132.jpg


Official specifications:
  • Voltage: 3.70V
  • Typical capacity: 5500mAh
  • Minimum Capacity: 5400mAh
  • Discharge cut-off voltage: 2.50V
  • Charge voltage: 4.20V +/- 0.05V
  • Standard charge current: 2000mA
  • Maximum constant discharge current: 10A
r%2026650%205500mAh%20P2655C%20(Black)%202020-info.png


This is a LiIon 26650 cell, i.e. a fairly large cell and it also has more capacity than smaller cells.

DSC_4130.jpg
DSC_4131.jpg


DSC_4133.jpg
DSC_4134.jpg


DSC_4135.jpg

DSC_4136.jpg


26650%205500mAh%20P2655C%20(Black)%202020-Capacity.png


The two cells do not match very well, they cell can deliver the rated current.

6650%205500mAh%20P2655C%20(Black)%202020-Temp-10.0.png


6650%205500mAh%20P2655C%20(Black)%202020-Temp-15.0.png


6650%205500mAh%20P2655C%20(Black)%202020-Temp-20.0.png


500mAh%20P2655C%20(Black)%202020-CapacityTimeHours.png


0%205500mAh%20P2655C%20(Black)%202020-CapacityTime.png


2026650%205500mAh%20P2655C%20(Black)%202020-Energy.png


%205500mAh%20P2655C%20(Black)%202020-PowerLoadTime.png


50%205500mAh%20P2655C%20(Black)%202020-TripCurrent.png


2026650%205500mAh%20P2655C%20(Black)%202020-Charge.png


P2655C%20%28Black%29%202020-pulse-1.0%2010%2010-IR.png




[size=+3]Conclusion[/size]

I am not very impressed by these cells, they do not match and get fairly warm at "high" current. They do have a small capacity advantage over 21700 cells.



[size=+3]Notes and links[/size]

The batteries was supplied by Keeppower for 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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries
 
Top